{"id":300026,"date":"2023-12-29T21:42:27","date_gmt":"2023-12-29T14:42:27","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=300026"},"modified":"2025-12-25T22:34:54","modified_gmt":"2025-12-25T15:34:54","slug":"cong-thuc-tinh-dien-tich-hinh-binh-hanh","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/cong-thuc-tinh-dien-tich-hinh-binh-hanh\/","title":{"rendered":"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec? \u0110\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec? L\u00e0 t\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n song song v\u00e0 b\u1eb1ng nhau \u2013 m\u1ed9t h\u00ecnh h\u1ecdc c\u01a1 b\u1ea3n trong ch\u01b0\u01a1ng tr\u00ecnh To\u00e1n l\u1edbp 4-8. C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh (S = a \u00d7 h) r\u1ea5t quan tr\u1ecdng, l\u00e0m n\u1ec1n t\u1ea3ng cho c\u00e1c h\u00ecnh ph\u1ee9c t\u1ea1p h\u01a1n. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch chi ti\u1ebft \u0111\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft, c\u00f4ng th\u1ee9c di\u1ec7n t\u00edch\/chu vi v\u00e0 b\u00e0i t\u1eadp minh h\u1ecda. Theo d\u00f5i \u0111\u1ec3 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c!<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 m\u1ed9t d\u1ea1ng h\u00ecnh h\u1ecdc kh\u00f4ng gian hai chi\u1ec1u, hay c\u00f2n g\u1ecdi l\u00e0 h\u00ecnh m\u1eb7t ph\u1eb3ng \u0111\u01a1n gi\u1ea3n. N\u00f3 l\u00e0 m\u1ed9t t\u1ee9 gi\u00e1c 4 c\u1ea1nh, c\u00f3 2 c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n song song v\u00e0 b\u1eb1ng nhau. Trong h\u00ecnh b\u00ecnh h\u00e0nh, c\u00e1c g\u00f3c \u0111\u1ed1i di\u1ec7n b\u1eb1ng nhau v\u00e0 c\u00e1c c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n c\u0169ng b\u1eb1ng nhau. Lo\u1ea1i h\u00ecnh h\u1ecdc n\u00e0y b\u1ea1n s\u1ebd b\u1eaft g\u1eb7p nhi\u1ec1u trong c\u00e1c \u0111\u1ec1 to\u00e1n h\u00ecnh h\u1ecdc, t\u1eeb h\u00ecnh h\u1ecdc m\u1eb7t ph\u1eb3ng \u0111\u1ebfn h\u00ecnh h\u1ecdc kh\u00f4ng gian.<\/span><\/p>\n<figure id=\"attachment_300919\" aria-describedby=\"caption-attachment-300919\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-300919 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-11-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300919\" class=\"wp-caption-text\">Kh\u00e1i ni\u1ec7m h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Kh\u00f4ng nh\u1eefng th\u1ebf, h\u00ecnh h\u1ecdc n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nhi\u1ec1u trong th\u1ef1c t\u1ebf. Nhi\u1ec1u c\u00f4ng vi\u1ec7c s\u1eed d\u1ee5ng h\u00ecnh nh\u01b0 ki\u1ebfn tr\u00fac, x\u00e2y d\u1ef1ng, thi\u1ebft k\u1ebf \u0111\u1ed3 h\u1ecda, khoa h\u1ecdc,&#8230; N\u00f3 c\u00f3 \u0111\u00f3ng g\u00f3p r\u1ea5t l\u1edbn trong s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 nghi\u00ean c\u1ee9u c\u1ee7a nhi\u1ec1u chuy\u00ean ng\u00e0nh kh\u00e1c nhau. Khi b\u1ea1n th\u1eadt s\u1ef1 t\u00ecm hi\u1ec3u s\u00e2u v\u00e0 hi\u1ec3u r\u00f5 v\u1ec1 n\u00f3, b\u1ea1n s\u1ebd th\u1ea5y \u0111\u01b0\u1ee3c s\u1ef1 k\u00ec di\u1ec7u c\u1ee7a to\u00e1n h\u1ecdc, c\u1ee7a h\u00ecnh h\u1ecdc m\u1eb7t ph\u1eb3ng v\u00e0 t\u00ednh \u1ee9ng d\u1ee5ng cao c\u1ee7a n\u00f3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y, b\u1ea1n c\u0169ng s\u1ebd th\u01b0\u1eddng hay b\u1eaft g\u1eb7p h\u00ecnh b\u00ecnh h\u00e0nh. Ch\u00fang s\u1ebd \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n d\u01b0\u1edbi nhi\u1ec1u d\u1ea1ng kh\u00e1c nhau. Tuy nhi\u00ean, c\u0103n c\u1ee9 v\u00e0o \u0111\u1ecbnh ngh\u0129a th\u00ec c\u00e1c h\u00ecnh h\u1ecdc \u1ea5y v\u1eabn \u0111\u01b0\u1ee3c xem l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh. V\u00ed d\u1ee5 nh\u01b0 h\u00ecnh ch\u1eef nh\u1eadt, n\u00f3 c\u00f3 2 c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n song song v\u00e0 b\u1eb1ng nhau. H\u00ecnh thoi c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 th\u1ebf, n\u00f3 c\u0169ng l\u00e0 m\u1ed9t d\u1ea1ng c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec1u v\u1edbi 4 c\u1ea1nh b\u1eb1ng nhau.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">T\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng v\u00e0 gi\u1ea3i t\u1ed1t c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 c\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan kh\u00e1c, b\u1ea1n c\u1ea7n th\u1eadt s\u1ef1 hi\u1ec3u r\u00f5 v\u1ec1 t\u00ednh ch\u1ea5t v\u00e0 \u0111\u1ecbnh ngh\u0129a c\u1ee7a n\u00f3. T\u1eeb t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 \u0111i ch\u1ee9ng minh v\u00e0 gi\u1ea3i r\u1ea5t nhi\u1ec1u d\u1ea1ng b\u00e0i t\u1eadp kh\u00e1c nhau. N\u00f3 s\u1ebd l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 gi\u00fap b\u1ea1n \u1ee9ng d\u1ee5ng linh ho\u1ea1t \u0111\u1ec3 \u0111i t\u00ecm h\u01b0\u1edbng gi\u1ea3i b\u00e0i. C\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh bao g\u1ed3m:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Hai \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh c\u1eaft nhau t\u1ea1i m\u1ed9t \u0111i\u1ec3m. \u0110i\u1ec3m \u0111\u00f3 l\u00e0 trung \u0111i\u1ec3m c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00e1c c\u1eb7p g\u00f3c \u0111\u1ed1i di\u1ec7n trong h\u00ecnh l\u1ea7n l\u01b0\u1ee3t s\u1ebd b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">C\u00e1c c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n trong h\u00ecnh l\u1ea7n l\u01b0\u1ee3t s\u1ebd b\u1eb1ng nhau.\u00a0<\/span><\/li>\n<\/ul>\n<figure id=\"attachment_300920\" aria-describedby=\"caption-attachment-300920\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"size-full wp-image-300920 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-12-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300920\" class=\"wp-caption-text\">T\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/figcaption><\/figure>\n<h2><b>D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft h\u00ecnh b\u00ecnh h\u00e0nh<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 nh\u1eadn bi\u1ebft nhanh m\u1ed9t t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh, \u00e1p d\u1ee5ng 5 d\u1ea5u hi\u1ec7u sau (d\u1ef1a tr\u00ean ch\u01b0\u01a1ng tr\u00ecnh SGK To\u00e1n):<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ee9 gi\u00e1c c\u00f3 m\u1ed9t c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song v\u00e0 b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">T\u1ee9 gi\u00e1c c\u00f3 hai g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m.<\/span><\/li>\n<\/ul>\n<p><b>V\u00ed d\u1ee5:<\/b><span style=\"font-weight: 400;\"> Trong c\u00e1c t\u1ee9 gi\u00e1c sau, ABCD l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh v\u00ec AB \/\/ CD v\u00e0 AB = CD (d\u1ea5u hi\u1ec7u 3).<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh chu\u1ea9n x\u00e1c nh\u1ea5t 2023<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c di\u1ec7n t\u00edch, b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 v\u1ec1 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u1ed3ng th\u1eddi, s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c \u0111\u00fang c\u0169ng l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 r\u1ea5t quan tr\u1ecdng \u0111\u1ebfn k\u1ebft qu\u1ea3 b\u00e0i to\u00e1n cu\u1ed1i c\u00f9ng c\u1ee7a b\u1ea1n. D\u1ef1a theo \u0111\u1eb7c \u0111i\u1ec3m, \u0111\u1ecbnh ngh\u0129a c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, ch\u00fang ta c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh nh\u01b0 sau:<\/span><\/p>\n<p><strong>Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng chi\u1ec1u cao nh\u00e2n v\u1edbi chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">C\u1ee5 th\u1ec3: S = a x h<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">S l\u00e0 k\u00ed hi\u1ec7u c\u1ee7a di\u1ec7n t\u00edch. \u0110\u01a1n v\u1ecb t\u00ednh s\u1ebd l\u00e0 m2, cm2, km2, \u2026<\/span><\/li>\n<li><span style=\"font-weight: 400;\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ee7a c\u1ea1nh \u0111\u00e1y. \u0110\u01a1n v\u1ecb t\u00ednh s\u1ebd l\u00e0 m, cm, km, \u2026<\/span><\/li>\n<li><span style=\"font-weight: 400;\">h l\u00e0 chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb t\u00ednh s\u1ebd l\u00e0 m, cm, km,&#8230;<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">L\u01b0u \u00fd: Khi \u0111\u00e3 c\u00f3 \u0111\u1ea7y \u0111\u1ee7 s\u1ed1 li\u1ec7u, b\u1ea1n c\u1ea7n ph\u1ea3i \u0111\u1ea3m b\u1ea3o t\u1ea5t c\u1ea3 c\u00e1c \u0111\u01a1n v\u1ecb c\u1ee7a m\u1ed7i d\u1eef li\u1ec7u \u0111\u1ec1u \u0111\u01b0\u1ee3c \u0111\u01b0a v\u1ec1 c\u00f9ng m\u1ed9t \u0111\u01a1n v\u1ecb \u0111o th\u00edch h\u1ee3p, c\u00f9ng l\u00e0 cm, m, km,&#8230;. \u0111\u1ec3 c\u00f3 \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch \u0111\u00fang t\u01b0\u01a1ng \u1ee9ng l\u00e0 cm2, m2, km2. N\u1ebfu kh\u00f4ng \u0111\u1ed5i v\u1ec1 c\u00f9ng \u0111\u01a1n v\u1ecb, k\u1ebft qu\u1ea3 b\u00e0i l\u00e0m c\u1ee7a b\u1ea1n s\u1ebd ho\u00e0n to\u00e0n sai.\u00a0<\/span><\/p>\n<figure id=\"attachment_300909\" aria-describedby=\"caption-attachment-300909\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"size-full wp-image-300909 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1.\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300909\" class=\"wp-caption-text\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh chu\u1ea9n x\u00e1c nh\u1ea5t 2023<\/figcaption><\/figure>\n<p><strong>V\u00ed d\u1ee5 minh h\u1ecda:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh bi\u1ebft chi\u1ec1u cao c\u1ee7a n\u00f3 l\u00e0 3 cm, chi\u1ec1u d\u00e0i \u0111\u00e1y l\u00e0 5 cm.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">S = a x h = 3 x 5 = 15 (cm2).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 15 cm2<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">C\u00e1c c\u00f4ng th\u1ee9c kh\u00e1c c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Ngo\u00e0i c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh c\u0169ng c\u00f3 nhi\u1ec1u c\u00e1c c\u00f4ng th\u1ee9c kh\u00e1c. B\u1ea1n c\u1ea7n ph\u1ea3i bi\u1ebft th\u00eam c\u00e1c c\u00f4ng th\u1ee9c kh\u00e1c \u0111\u1ec3 b\u1ed5 sung th\u00eam trong vi\u1ec7c gi\u1ea3i b\u00e0i t\u1eadp c\u1ee7a m\u00ecnh.\u00a0 Bao g\u1ed3m:<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Chu vi h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 t\u1ed5ng s\u1ed1 \u0111o c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. C\u00f4ng th\u1ee9c t\u00ednh s\u1ebd kh\u00e1 \u0111\u01a1n gi\u1ea3n v\u00e0 nhanh ch\u00f3ng. C\u1ee5 th\u1ec3:<\/span><\/p>\n<p><strong>Chu vi h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng c\u1ea1nh \u0111\u00e1y c\u1ed9ng v\u1edbi c\u1ea1nh b\u00ean, t\u1ea5t c\u1ea3 nh\u00e2n 2.\u00a0<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">C= (a+b)x2<\/span><\/p>\n<figure id=\"attachment_300910\" aria-describedby=\"caption-attachment-300910\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300910 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300910\" class=\"wp-caption-text\">C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh b\u00ecnh h\u00e0nh<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">C l\u00e0 k\u00ed hi\u1ec7u chu vi c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb:cm; dm; km; m;&#8230;<\/span><\/li>\n<li><span style=\"font-weight: 400;\">a l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh \u0111\u00e1y h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb: cm, dm, km, m,..<\/span><\/li>\n<li><span style=\"font-weight: 400;\">b l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh b\u00ean c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb:cm, dm, km, m,..<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng cao h\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u01b0\u1eddng cao h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa hai c\u1ea1nh \u0111\u00e1y trong h\u00ecnh. C\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao s\u1ebd b\u1eb1ng \u0111\u01b0\u1eddng ch\u00e9o chia cho c\u1ea1nh.<\/span><\/p>\n<p><strong>h= \u0111\u01b0\u1eddng ch\u00e9o\/a<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3: <\/span><span style=\"font-weight: 400;\">a l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh \u0111\u00e1y h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb: cm, dm, km, m,..<\/span><\/p>\n<figure id=\"attachment_300911\" aria-describedby=\"caption-attachment-300911\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300911 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300911\" class=\"wp-caption-text\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng cao h\u00ecnh b\u00ecnh h\u00e0nh<\/figcaption><\/figure>\n<h3><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">\u0110\u01b0\u1eddng ch\u00e9o h\u00ecnh l\u00e0 c\u1ea1nh n\u1ed1i li\u1ec1n hai \u0111\u1ec9nh \u0111\u1ed1i di\u1ec7n nhau. \u0110\u1ed9 d\u00e0i \u0111\u01b0\u1eddng ch\u00e9o \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00f4ng th\u1ee9c nh\u01b0:<\/span><\/p>\n<p><strong>\u0110\u01b0\u1eddng ch\u00e9o = \u221a(a^2+b^2)<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">a l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh \u0111\u00e1y h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb: cm, dm, km, m,..<\/span><\/li>\n<li><span style=\"font-weight: 400;\">b l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a c\u1ea1nh b\u00ean c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb:cm, dm, km, m,..<\/span><\/li>\n<\/ul>\n<figure id=\"attachment_300912\" aria-describedby=\"caption-attachment-300912\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300912 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300912\" class=\"wp-caption-text\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/figcaption><\/figure>\n<h3><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh khi bi\u1ebft \u0111\u1ed9 d\u00e0i hai \u0111\u01b0\u1eddng ch\u00e9o<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Khi b\u1ea1n ch\u1ec9 c\u00f3 d\u1eef li\u1ec7u \u0111\u1ed3 d\u00e0i c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o v\u00e0 chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh, c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch s\u1ebd nhanh ch\u00f3ng v\u00e0 \u0111\u01a1n gi\u1ea3n. B\u1ea1n ch\u1ec9 c\u1ea7n th\u1ef1c hi\u1ec7n c\u00f4ng th\u1ee9c.<\/span><\/p>\n<p><strong>S= \u00bd x (d1+d2)xh<\/strong><\/p>\n<figure id=\"attachment_300913\" aria-describedby=\"caption-attachment-300913\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300913 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300913\" class=\"wp-caption-text\">di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh khi bi\u1ebft \u0111\u1ed9 d\u00e0i hai \u0111\u01b0\u1eddng ch\u00e9o<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\">Trong \u0111\u00f3:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">h1, h2 l\u1ea7n l\u01b0\u1ee3t l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ee7a hai \u0111\u01b0\u1eddng ch\u00e9o. \u0110\u01a1n v\u1ecb: cm, dm, km, m,..<\/span><\/li>\n<li><span style=\"font-weight: 400;\">h\u00a0 l\u00e0 chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh. \u0110\u01a1n v\u1ecb:cm, dm, km, m,..<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">\u0110\u1ec3 gi\u00fap b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng hi\u1ec3u c\u0169ng nh\u01b0 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c v\u00e0o c\u00e1c ki\u1ebfn th\u1ee9c b\u00e0i t\u1eadp c\u1ee5 th\u1ec3, ch\u00fang ta s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i t\u1eadp t\u1eeb c\u00f4ng th\u1ee9c n\u00e0y. M\u1ed7i d\u1ea1ng s\u1ebd l\u00e0 m\u1ed9t thay \u0111\u1ed5i nh\u1ecf trong d\u1eef li\u1ec7u b\u00e0i cho \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n gi\u1ea3i. Tham kh\u1ea3o m\u1ed9t s\u1ed1 d\u1ea1ng b\u00e0i d\u01b0\u1edbi \u0111\u00e2y:<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao h\u00ecnh b\u00ecnh h\u00e0nh khi bi\u1ebft \u0111\u1ed9 di\u1ec7n t\u00edch v\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u00e1y<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e1ch gi\u1ea3i: T\u1eeb c\u00f4ng th\u1ee9c ban \u0111\u1ea7u, S= a x h. Ta c\u00f3 th\u1ec3 suy lu\u1eadn ra c\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao nh\u01b0 sau:<\/span><\/p>\n<p><strong>h = S \/ a<\/strong><\/p>\n<figure id=\"attachment_300914\" aria-describedby=\"caption-attachment-300914\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300914 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-6-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300914\" class=\"wp-caption-text\">C\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u cao h\u00ecnh b\u00ecnh h\u00e0nh khi bi\u1ebft \u0111\u1ed9 di\u1ec7n t\u00edch v\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u00e1y<\/figcaption><\/figure>\n<p><strong>B\u00e0i t\u1eadp v\u00ed d\u1ee5:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Cho h\u00ecnh b\u00ecnh h\u00e0nh ABCD, t\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean. Bi\u1ebft chi\u1ec1u d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh l\u00e0 1,4 dm. Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD l\u00e0 70 cm2.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ed5i a =1,4 dm = 14 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">h = S \/ a = 70 \/ 14 = 5 (cm).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 5 cm<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y h\u00ecnh b\u00ecnh h\u00e0nh khi bi\u1ebft \u0111\u1ed9 di\u1ec7n t\u00edch v\u00e0 chi\u1ec1u cao<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">C\u00e1ch gi\u1ea3i: T\u1eeb c\u00f4ng th\u1ee9c ban \u0111\u1ea7u, S= a x h. Ta c\u00f3 th\u1ec3 suy lu\u1eadn ra c\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u d\u00e0i \u0111\u00e1y nh\u01b0 sau:<\/span><\/p>\n<p><strong>a = S \/ h<\/strong><\/p>\n<figure id=\"attachment_300915\" aria-describedby=\"caption-attachment-300915\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300915 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-7-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300915\" class=\"wp-caption-text\">C\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y h\u00ecnh b\u00ecnh h\u00e0nh khi bi\u1ebft \u0111\u1ed9 di\u1ec7n t\u00edch v\u00e0 chi\u1ec1u cao<\/figcaption><\/figure>\n<p><strong>B\u00e0i t\u1eadp v\u00ed d\u1ee5:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Cho h\u00ecnh b\u00ecnh h\u00e0nh EFGH, c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ee7a chi\u1ec1u cao l\u00e0 10 cm, di\u1ec7n t\u00edch h\u00ecnh l\u00e0 50 cm2. T\u00ecnh chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y c\u1ee7a EFGH.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chi\u1ec1u d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh EFGH l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">a = S \/ h = 50 \/ 10 = 5 (cm).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 5 cm<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">B\u00e0i t\u1eadp t\u1ed5ng h\u1ee3p<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">B\u00e0i t\u1eadp t\u1ed5ng h\u1ee3p l\u00e0 m\u1ed9t d\u1ea1ng b\u00e0i t\u1eadp \u00e1p d\u1ee5ng r\u1ea5t nhi\u1ec1u c\u00e1c c\u00f4ng th\u1ee9c v\u00e0 s\u1eed d\u1ee5ng nhi\u1ec1u lo\u1ea1i h\u00ecnh kh\u00e1c nhau trong c\u00f9ng m\u1ed9t b\u00e0i to\u00e1n. N\u00f3 s\u1ebd kh\u00f4ng \u0111\u01a1n gi\u1ea3n ch\u1ec9 bao g\u1ed3m m\u1ed9t b\u01b0\u1edbc t\u00ednh c\u01a1 b\u1ea3n nh\u01b0 \u1edf tr\u00ean. \u1ede \u0111\u00f3, b\u1ea1n c\u1ea7n n\u1eafm r\u00f5 c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 d\u00f9ng th\u00e0nh th\u1ea1o. Sau \u0111\u00f3, b\u1ea1n s\u1ebd k\u1ebft h\u1ee3p n\u00f3 v\u1edbi r\u1ea5t nhi\u1ec1u nh\u1eefng c\u00f4ng th\u1ee9c kh\u00e1c. T\u00f9y theo \u0111\u1ed9 kh\u00f3 c\u1ee7a b\u00e0i m\u00e0 qu\u00e1 tr\u00ecnh suy lu\u1eadn s\u1ebd nhanh hay ch\u1eadm.\u00a0<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">B\u00e0i t\u1eadp minh h\u1ecda c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh<\/span><\/h2>\n<p>\u0110\u1ec3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c th\u00e0nh th\u1ea1o v\u00e0 \u0111\u00fang, ch\u00fang ta c\u1ea7n luy\u1ec7n t\u1eadp nhi\u1ec1u h\u01a1n. C\u00e1c b\u00e0i t\u1eadp Ho\u00e0ng H\u00e0 Mobile mang \u0111\u1ebfn cho b\u1ea1n d\u01b0\u1edbi \u0111\u00e2y s\u1ebd l\u00e0 c\u00e1c b\u00e0i t\u1eadp c\u01a1 b\u1ea3n nh\u1ea5t. S\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u1eeb c\u00f4ng th\u1ee9c di\u1ec7n t\u00edch th\u00e0nh c\u00e1c c\u00f4ng th\u1ee9c kh\u00e1c \u0111\u1ec3 t\u00ecm c\u00e1c th\u00e0nh ph\u1ea7n trong h\u00ecnh b\u00ecnh h\u00e0nh c\u0169ng r\u1ea5t quan tr\u1ecdng. N\u00f3 gi\u00fap b\u1ea1n n\u00e2ng cao t\u01b0 duy v\u00e0 l\u00e0m to\u00e1n t\u1ed1t h\u01a1n. Tham kh\u1ea3o c\u00e1c m\u1eabu m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp b\u00ean d\u01b0\u1edbi:<\/p>\n<h3><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp minh h\u1ecda v\u1ec1 t\u00ednh di\u1ec7n t\u00edch<\/span><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>B\u00e0i 1<\/strong>: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ee7a c\u1ea1nh \u0111\u00e1y l\u00e0 12 cm, chi\u1ec1u cao l\u00e0 5 cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">S = a x h = 12 x 5 =\u00a0 60 (cm2).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 60 cm2<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1eady di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean l\u00e0 60 cm2.<\/span><\/p>\n<figure id=\"attachment_300916\" aria-describedby=\"caption-attachment-300916\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300916 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-8-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300916\" class=\"wp-caption-text\">M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp minh h\u1ecda v\u1ec1 t\u00ednh di\u1ec7n t\u00edch<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\"><strong>B\u00e0i 2<\/strong>: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ee7a c\u1ea1nh \u0111\u00e1y l\u00e0 1dm, chi\u1ec1u cao l\u00e0 4 cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ed5i: a= 1dm= 10 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">S = a x h = 10 x 4 =\u00a0 40 (cm2).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 40 cm2<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1eady di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean l\u00e0 40cm2.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp minh h\u1ecda v\u1ec1 t\u00ednh chi\u1ec1u cao<\/span><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>B\u00e0i 3<\/strong>: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 chi\u1ec1u d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh l\u00e0 25cm. Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean l\u00e0 100cm2, t\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">h = S \/ a = 100 \/ 25 = 4 (cm).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 4 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1eady chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 4cm.<\/span><\/p>\n<figure id=\"attachment_300917\" aria-describedby=\"caption-attachment-300917\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300917 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-9-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300917\" class=\"wp-caption-text\">M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp minh h\u1ecda v\u1ec1 t\u00ednh chi\u1ec1u cao<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\"><strong>B\u00e0i 4<\/strong>: Cho h\u00ecnh b\u00ecnh h\u00e0nh MNPQ c\u00f3 chi\u1ec1u d\u00e0i \u0111\u00e1y MN= PQ=16 cm. Di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean l\u00e0 1,6 m2, t\u00ednh chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh tr\u00ean.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ed5i a = 1,6 dm2 = 160cm2<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh ABCD l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">h = S \/ a = 160 \/ 16 = 10 (cm).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 10 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1eady chi\u1ec1u cao c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh MNPQ l\u00e0 10cm.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp minh h\u1ecda v\u1ec1 t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y<\/span><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>B\u00e0i 5<\/strong>: Cho h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ee7a chi\u1ec1u cao l\u00e0 20 cm, di\u1ec7n t\u00edch h\u00ecnh l\u00e0 1200 cm2. T\u00ecnh chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u00e1y c\u1ee7a h\u00ecnh tr\u00ean.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chi\u1ec1u d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">a = S \/ h = 1200 \/ 20 = 60 (cm).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 60 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1eady chi\u1ec1u d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 60cm<\/span><\/p>\n<figure id=\"attachment_300918\" aria-describedby=\"caption-attachment-300918\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-300918 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10.jpg\" alt=\"Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/Cong-thuc-tinh-dien-tich-hinh-binh-hanh-10-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><figcaption id=\"caption-attachment-300918\" class=\"wp-caption-text\">M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp minh h\u1ecda v\u1ec1 t\u00ednh \u0111\u1ed9 d\u00e0i \u0111\u00e1y<\/figcaption><\/figure>\n<p><span style=\"font-weight: 400;\"><strong>B\u00e0i 6<\/strong>: Cho h\u00ecnh b\u00ecnh h\u00e0nh IHKG c\u00f3 \u0111\u1ed9 d\u00e0i c\u1ee7a chi\u1ec1u cao l\u00e0 100mm, di\u1ec7n t\u00edch h\u00ecnh l\u00e0 130cm2. T\u00ecnh chi\u1ec1u d\u00e0i \u0111\u00e1y IH= GK c\u1ee7a h\u00ecnh tr\u00ean.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gi\u1ea3i:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1ed5i: h=100mm=10cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Chi\u1ec1u d\u00e0i \u0111\u00e1y c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh IHKG l\u00e0:<\/span><\/p>\n<p><span style=\"font-weight: 400;\">IH= GK = a = S \/ h = 130 \/ 10 = 13 (cm).<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u00e1p s\u1ed1: 13 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">V\u1eady chi\u1ec1u d\u00e0i \u0111\u00e1y IH =GK c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 13cm.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">L\u1eddi k\u1ebft<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh r\u1ea5t quan tr\u1ecdng v\u00e0 kh\u00e1 c\u01a1 b\u1ea3n. N\u00f3 s\u1ebd l\u00e0 c\u01a1 s\u1edf ban \u0111\u1ea7u gi\u00fap b\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng gi\u1ea3i nh\u1eefng b\u00e0i to\u00e1n ph\u1ee9c t\u1ea1p v\u00e0 y\u00eau c\u1ea7u s\u1ef1 suy lu\u1eadn s\u00e2u h\u01a1n. Trong b\u00e0i vi\u1ebft tr\u00ean \u0111\u00e2y, Ho\u00e0ng H\u00e0 Mobile \u0111\u00e3 mang \u0111\u1ebfn cho b\u1ea1n c\u00f4ng th\u1ee9c t\u00ednh c\u1ee5 th\u1ec3 v\u00e0 ch\u00ednh x\u00e1c nh\u1ea5t. \u0110\u1ed3ng th\u1eddi, m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp nh\u1ecf gi\u00fap b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c h\u00e0nh v\u00e0 luy\u1ec7n t\u1eadp nhi\u1ec1u h\u01a1n \u0111\u1ec3 thu\u1ea7n th\u1ee5c h\u01a1n khi s\u1eed d\u1ee5ng. Ngo\u00e0i ra, c\u00e1c c\u00f4ng th\u1ee9c b\u1ed5 sung th\u00eam ch\u1eafc ch\u1eafn s\u1ebd gi\u00fap \u00edch cho ch\u00fang ta khi gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n kh\u00f3 h\u01a1n. Ghi l\u1ea1i ngay nh\u00e9.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u0110\u1eebng qu\u00ean theo d\u00f5i Ho\u00e0ng H\u00e0 Mobile \u0111\u1ec3 c\u1eadp nh\u1eadt nh\u1eefng th\u00f4ng tin m\u1edbi nh\u1ea5t nh\u00e9.\u00a0<\/span><\/p>\n<p>Xem th\u00eam:<\/p>\n<ul>\n<li class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/the-tich-khoi-chop\/\">C\u00f4ng th\u1ee9c t\u00ednh nhanh th\u1ec3 t\u00edch kh\u1ed1i ch\u00f3p \u2013 T\u00ednh to\u00e1n d\u1ec5 d\u00e0ng v\u00e0 hi\u1ec7u qu\u1ea3<\/a><\/li>\n<li>\n<p class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cach-tinh-dien-tich-tam-giac-vuong\/\">C\u00f4ng th\u1ee9c c\u00e1ch t\u00ednh di\u1ec7n t\u00edch v\u00e0 \u0111\u01b0\u1eddng cao tam gi\u00e1c vu\u00f4ng<\/a><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec? L\u00e0 t\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i di\u1ec7n song song v\u00e0 b\u1eb1ng nhau \u2013 m\u1ed9t h\u00ecnh h\u1ecdc c\u01a1 b\u1ea3n trong ch\u01b0\u01a1ng tr\u00ecnh To\u00e1n l\u1edbp 4-8. C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh (S = a \u00d7 h) r\u1ea5t quan tr\u1ecdng, l\u00e0m n\u1ec1n t\u1ea3ng cho c\u00e1c h\u00ecnh ph\u1ee9c t\u1ea1p [&hellip;]<\/p>\n","protected":false},"author":98,"featured_media":300922,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-300026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec? \u0110\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft &amp; c\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch<\/title>\n<meta name=\"description\" content=\"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec? 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