{"id":300691,"date":"2023-12-29T17:44:47","date_gmt":"2023-12-29T10:44:47","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=300691"},"modified":"2026-11-05T14:08:21","modified_gmt":"2026-11-05T07:08:21","slug":"dien-tich-hinh-hop-chu-nhat","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/dien-tich-hinh-hop-chu-nhat\/","title":{"rendered":"Di\u1ec7n T\u00edch To\u00e0n Ph\u1ea7n H\u00ecnh H\u1ed9p Ch\u1eef Nh\u1eadt: C\u00f4ng Th\u1ee9c V\u00e0 V\u00ed D\u1ee5 Chi Ti\u1ebft"},"content":{"rendered":"<p><strong>Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt b\u1eb1ng di\u1ec7n t\u00edch xung quanh c\u1ed9ng di\u1ec7n t\u00edch hai \u0111\u00e1y: S<sub>tp<\/sub> = 2(a + b) \u00d7 h + 2ab, v\u1edbi a l\u00e0 chi\u1ec1u d\u00e0i, b l\u00e0 chi\u1ec1u r\u1ed9ng, h l\u00e0 chi\u1ec1u cao.<\/strong> Di\u1ec7n t\u00edch xung quanh (4 m\u1eb7t b\u00ean) l\u00e0 S<sub>xq<\/sub> = 2(a + b) \u00d7 h. V\u00ed d\u1ee5 h\u1ed9p d\u00e0i 20 cm, r\u1ed9ng 7 cm, cao 20 cm c\u00f3 S<sub>xq<\/sub> = 1 080 cm\u00b2 v\u00e0 S<sub>tp<\/sub> = 1 360 cm\u00b2. B\u00e0i vi\u1ebft tr\u00ecnh b\u00e0y \u0111\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c, c\u00e1ch t\u00ecm chi\u1ec1u cao khi bi\u1ebft di\u1ec7n t\u00edch, b\u00e0i to\u00e1n h\u1ed9p kh\u00f4ng n\u1eafp v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i theo ch\u01b0\u01a1ng tr\u00ecnh To\u00e1n l\u1edbp 5.<\/p>\n<p><strong>T\u00f3m t\u1eaft nhanh:<\/strong><\/p>\n<ul>\n<li><strong>Di\u1ec7n t\u00edch xung quanh:<\/strong> S<sub>xq<\/sub> = chu vi \u0111\u00e1y \u00d7 chi\u1ec1u cao = 2(a + b) \u00d7 h.<\/li>\n<li><strong>Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n:<\/strong> S<sub>tp<\/sub> = S<sub>xq<\/sub> + 2 \u00d7 a \u00d7 b.<\/li>\n<li><strong>H\u1ed9p kh\u00f4ng n\u1eafp:<\/strong> S = S<sub>xq<\/sub> + a \u00d7 b (ch\u1ec9 m\u1ed9t \u0111\u00e1y).<\/li>\n<li><strong>T\u00ecm chi\u1ec1u cao:<\/strong> h = S<sub>xq<\/sub> : [2(a + b)].<\/li>\n<\/ul>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-300693\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-1.jpg\" alt=\"H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt v\u1edbi chi\u1ec1u d\u00e0i a, chi\u1ec1u r\u1ed9ng b, chi\u1ec1u cao h\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt l\u00e0 g\u00ec?<\/h2>\n<p>H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt l\u00e0 h\u00ecnh kh\u00f4ng gian c\u00f3 6 m\u1eb7t \u0111\u1ec1u l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt; hai m\u1eb7t \u0111\u1ed1i di\u1ec7n song song v\u00e0 b\u1eb1ng nhau. Hai m\u1eb7t n\u1eb1m d\u01b0\u1edbi v\u00e0 tr\u00ean g\u1ecdi l\u00e0 hai \u0111\u00e1y, b\u1ed1n m\u1eb7t c\u00f2n l\u1ea1i l\u00e0 c\u00e1c m\u1eb7t b\u00ean. H\u1ed9p ph\u1ea5n, h\u1ed9p s\u1eefa, vi\u00ean g\u1ea1ch, c\u0103n ph\u00f2ng l\u00e0 c\u00e1c v\u00ed d\u1ee5 quen thu\u1ed9c.<\/p>\n<ul>\n<li>C\u00f3 8 \u0111\u1ec9nh, 12 c\u1ea1nh v\u00e0 6 m\u1eb7t.<\/li>\n<li>Ba k\u00edch th\u01b0\u1edbc: chi\u1ec1u d\u00e0i a, chi\u1ec1u r\u1ed9ng b, chi\u1ec1u cao h.<\/li>\n<li>C\u00e1c m\u1eb7t \u0111\u1ed1i di\u1ec7n c\u00f3 c\u00f9ng di\u1ec7n t\u00edch v\u00e0 chu vi.<\/li>\n<li>B\u1ed1n \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh h\u1ed9p (n\u1ed1i hai \u0111\u1ec9nh kh\u00f4ng c\u00f9ng n\u1eb1m tr\u00ean m\u1ed9t m\u1eb7t) b\u1eb1ng nhau v\u00e0 c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng.<\/li>\n<li>H\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0 h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt \u0111\u1eb7c bi\u1ec7t c\u00f3 ba k\u00edch th\u01b0\u1edbc b\u1eb1ng nhau.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-300694\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-2.jpg\" alt=\"H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt c\u00f3 6 m\u1eb7t, 8 \u0111\u1ec9nh, 12 c\u1ea1nh\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch xung quanh h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt<\/h2>\n<p>Di\u1ec7n t\u00edch xung quanh l\u00e0 t\u1ed5ng di\u1ec7n t\u00edch b\u1ed1n m\u1eb7t b\u00ean, b\u1eb1ng chu vi \u0111\u00e1y nh\u00e2n v\u1edbi chi\u1ec1u cao:<\/p>\n<p style=\"text-align: center;\"><strong>S<sub>xq<\/sub> = 2(a + b) \u00d7 h<\/strong><\/p>\n<p>V\u00ed d\u1ee5: h\u1ed9p d\u00e0i 20 cm, r\u1ed9ng 7 cm, cao 20 cm c\u00f3 chu vi \u0111\u00e1y 2 \u00d7 (20 + 7) = 54 cm, n\u00ean S<sub>xq<\/sub> = 54 \u00d7 20 = 1 080 cm\u00b2.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-300695\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-3.jpg\" alt=\"C\u00f4ng th\u1ee9c di\u1ec7n t\u00edch xung quanh h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt Sxq = (a + b) \u00d7 2 \u00d7 h\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt<\/h2>\n<p>Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n l\u00e0 t\u1ed5ng di\u1ec7n t\u00edch c\u1ea3 6 m\u1eb7t, g\u1ed3m di\u1ec7n t\u00edch xung quanh v\u00e0 di\u1ec7n t\u00edch hai \u0111\u00e1y (m\u1ed7i \u0111\u00e1y c\u00f3 di\u1ec7n t\u00edch a \u00d7 b):<\/p>\n<p style=\"text-align: center;\"><strong>S<sub>tp<\/sub> = S<sub>xq<\/sub> + 2ab = 2(a + b) \u00d7 h + 2ab<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-300696\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-4.jpg\" alt=\"C\u00f4ng th\u1ee9c di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>\u0110\u1ea1i l\u01b0\u1ee3ng<\/th>\n<th>C\u00f4ng th\u1ee9c<\/th>\n<th>V\u1edbi a = 20, b = 7, h = 20 (cm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Chu vi \u0111\u00e1y<\/td>\n<td>2(a + b)<\/td>\n<td>54 cm<\/td>\n<\/tr>\n<tr>\n<td>Di\u1ec7n t\u00edch m\u1ed9t \u0111\u00e1y<\/td>\n<td>a \u00d7 b<\/td>\n<td>140 cm\u00b2<\/td>\n<\/tr>\n<tr>\n<td>Di\u1ec7n t\u00edch xung quanh<\/td>\n<td>2(a + b) \u00d7 h<\/td>\n<td>1 080 cm\u00b2<\/td>\n<\/tr>\n<tr>\n<td>Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n<\/td>\n<td>S<sub>xq<\/sub> + 2ab<\/td>\n<td>1 080 + 280 = 1 360 cm\u00b2<\/td>\n<\/tr>\n<tr>\n<td>Th\u1ec3 t\u00edch (\u0111\u1ec3 \u0111\u1ed1i chi\u1ebfu)<\/td>\n<td>a \u00d7 b \u00d7 h<\/td>\n<td>2 800 cm\u00b3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u00e1ch t\u00ednh th\u1ec3 t\u00edch c\u00f3 trong b\u00e0i <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/the-tich-hinh-hop-chu-nhat\/\">th\u1ec3 t\u00edch h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt<\/a>.<\/p>\n<h2>V\u00ed d\u1ee5 t\u00ednh di\u1ec7n t\u00edch h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt c\u00f3 l\u1eddi gi\u1ea3i<\/h2>\n<p><strong>V\u00ed d\u1ee5 1:<\/strong> H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 20 cm, chi\u1ec1u r\u1ed9ng 7 cm, chi\u1ec1u cao 20 cm. T\u00ednh S<sub>xq<\/sub> v\u00e0 S<sub>tp<\/sub>.<br \/>L\u1eddi gi\u1ea3i: S<sub>xq<\/sub> = 2 \u00d7 (20 + 7) \u00d7 20 = 1 080 cm\u00b2. S<sub>tp<\/sub> = 1 080 + 2 \u00d7 20 \u00d7 7 = 1 360 cm\u00b2.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-300697\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-5.jpg\" alt=\"B\u00e0i t\u1eadp t\u00ednh di\u1ec7n t\u00edch xung quanh v\u00e0 to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p 20 cm, 7 cm, 20 cm\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>V\u00ed d\u1ee5 2 (t\u00ecm chi\u1ec1u cao):<\/strong> H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt d\u00e0i 20 cm, r\u1ed9ng 7 cm, c\u00f3 S<sub>xq<\/sub> = 540 cm\u00b2. T\u00ednh chi\u1ec1u cao v\u00e0 S<sub>tp<\/sub>.<br \/>L\u1eddi gi\u1ea3i: h = 540 : [2 \u00d7 (20 + 7)] = 540 : 54 = 10 cm. S<sub>tp<\/sub> = 540 + 2 \u00d7 20 \u00d7 7 = 820 cm\u00b2.<\/p>\n<p><strong>V\u00ed d\u1ee5 3 (h\u1ed9p kh\u00f4ng n\u1eafp):<\/strong> Ng\u01b0\u1eddi ta l\u00e0m m\u1ed9t c\u00e1i h\u1ed9p kh\u00f4ng n\u1eafp b\u1eb1ng t\u00f4n, d\u00e0i 30 cm, r\u1ed9ng 20 cm, cao 15 cm. T\u00ednh di\u1ec7n t\u00edch t\u00f4n c\u1ea7n d\u00f9ng (kh\u00f4ng t\u00ednh m\u00e9p h\u00e0n).<br \/>L\u1eddi gi\u1ea3i: S<sub>xq<\/sub> = 2 \u00d7 (30 + 20) \u00d7 15 = 1 500 cm\u00b2; di\u1ec7n t\u00edch \u0111\u00e1y = 30 \u00d7 20 = 600 cm\u00b2. Di\u1ec7n t\u00edch t\u00f4n = 1 500 + 600 = 2 100 cm\u00b2.<\/p>\n<p><strong>V\u00ed d\u1ee5 4:<\/strong> H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt d\u00e0i 20 cm, r\u1ed9ng 16 cm, cao 10 cm. T\u00ednh S<sub>xq<\/sub> v\u00e0 S<sub>tp<\/sub>.<br \/>L\u1eddi gi\u1ea3i: S<sub>xq<\/sub> = 2 \u00d7 (20 + 16) \u00d7 10 = 720 cm\u00b2. S<sub>tp<\/sub> = 720 + 2 \u00d7 20 \u00d7 16 = 1 360 cm\u00b2.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-300701\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-9.jpg\" alt=\"H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt d\u00e0i 20 cm, r\u1ed9ng 16 cm, cao 10 cm\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-9.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-9-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-9-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-300702\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-10.jpg\" alt=\"H\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c x\u1ebfp t\u1eeb c\u00e1c h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u01a1n v\u1ecb\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-10.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-10-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-10-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>V\u00ed d\u1ee5 5 (h\u00ecnh l\u1eadp ph\u01b0\u01a1ng):<\/strong> H\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u1ea1nh 4 dm. T\u00ednh di\u1ec7n t\u00edch xung quanh v\u00e0 to\u00e0n ph\u1ea7n.<br \/>L\u1eddi gi\u1ea3i: m\u1ed7i m\u1eb7t c\u00f3 di\u1ec7n t\u00edch 4 \u00d7 4 = 16 dm\u00b2. S<sub>xq<\/sub> = 4 \u00d7 16 = 64 dm\u00b2, S<sub>tp<\/sub> = 6 \u00d7 16 = 96 dm\u00b2. Xem th\u00eam b\u00e0i <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dien-tich-toan-phan-hinh-lap-phuong\/\">di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-300704\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-11.jpg\" alt=\"H\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0 h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt \u0111\u1eb7c bi\u1ec7t\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-11.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-11-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-11-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<p><strong>V\u00ed d\u1ee5 6 (th\u1ef1c t\u1ebf):<\/strong> C\u0103n ph\u00f2ng d\u00e0i 5 m, r\u1ed9ng 4 m, cao 3 m. T\u00ednh di\u1ec7n t\u00edch c\u1ea7n s\u01a1n g\u1ed3m b\u1ed1n b\u1ee9c t\u01b0\u1eddng v\u00e0 tr\u1ea7n (ch\u01b0a tr\u1eeb c\u1eeda).<br \/>L\u1eddi gi\u1ea3i: b\u1ed1n b\u1ee9c t\u01b0\u1eddng l\u00e0 S<sub>xq<\/sub> = 2 \u00d7 (5 + 4) \u00d7 3 = 54 m\u00b2; tr\u1ea7n = 5 \u00d7 4 = 20 m\u00b2. T\u1ed5ng 74 m\u00b2.<\/p>\n<h2>L\u01b0u \u00fd khi t\u00ednh di\u1ec7n t\u00edch h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt<\/h2>\n<ul>\n<li>\u0110\u1ed5i ba k\u00edch th\u01b0\u1edbc v\u1ec1 c\u00f9ng m\u1ed9t \u0111\u01a1n v\u1ecb tr\u01b0\u1edbc khi t\u00ednh.<\/li>\n<li>\u0110\u1ecdc k\u1ef9 \u0111\u1ec1: t\u00ednh xung quanh (4 m\u1eb7t b\u00ean), to\u00e0n ph\u1ea7n (6 m\u1eb7t) hay h\u1ed9p kh\u00f4ng n\u1eafp (5 m\u1eb7t).<\/li>\n<li>Di\u1ec7n t\u00edch d\u00f9ng \u0111\u01a1n v\u1ecb vu\u00f4ng (cm\u00b2, m\u00b2), th\u1ec3 t\u00edch d\u00f9ng \u0111\u01a1n v\u1ecb kh\u1ed1i (cm\u00b3, m\u00b3).<\/li>\n<li>Khi \u0111\u1ec1 cho di\u1ec7n t\u00edch v\u00e0 h\u1ecfi m\u1ed9t k\u00edch th\u01b0\u1edbc, h\u00e3y vi\u1ebft c\u00f4ng th\u1ee9c r\u1ed3i suy ng\u01b0\u1ee3c.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-300700\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-8.jpg\" alt=\"L\u01b0u \u00fd khi gi\u1ea3i b\u00e0i t\u1eadp h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-8.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-8-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/dien-tich-hinh-hop-chu-nhat-8-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt l\u00e0 g\u00ec?<\/h3>\n<p>S<sub>tp<\/sub> = 2(a + b) \u00d7 h + 2ab, t\u1ee9c di\u1ec7n t\u00edch xung quanh c\u1ed9ng di\u1ec7n t\u00edch hai \u0111\u00e1y.<\/p>\n<h3>Di\u1ec7n t\u00edch xung quanh h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt t\u00ednh th\u1ebf n\u00e0o?<\/h3>\n<p>L\u1ea5y chu vi \u0111\u00e1y nh\u00e2n v\u1edbi chi\u1ec1u cao: S<sub>xq<\/sub> = 2(a + b) \u00d7 h.<\/p>\n<h3>Di\u1ec7n t\u00edch xung quanh v\u00e0 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n kh\u00e1c nhau th\u1ebf n\u00e0o?<\/h3>\n<p>Di\u1ec7n t\u00edch xung quanh ch\u1ec9 g\u1ed3m 4 m\u1eb7t b\u00ean; di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n g\u1ed3m 4 m\u1eb7t b\u00ean v\u00e0 2 m\u1eb7t \u0111\u00e1y.<\/p>\n<h3>Bi\u1ebft di\u1ec7n t\u00edch xung quanh, t\u00ecm chi\u1ec1u cao th\u1ebf n\u00e0o?<\/h3>\n<p>Chia di\u1ec7n t\u00edch xung quanh cho chu vi \u0111\u00e1y: h = S<sub>xq<\/sub> : [2(a + b)].<\/p>\n<h3>H\u1ed9p kh\u00f4ng n\u1eafp t\u00ednh di\u1ec7n t\u00edch th\u1ebf n\u00e0o?<\/h3>\n<p>C\u1ed9ng di\u1ec7n t\u00edch xung quanh v\u1edbi di\u1ec7n t\u00edch m\u1ed9t \u0111\u00e1y: S = 2(a + b) \u00d7 h + a \u00d7 b.<\/p>\n<h3>Di\u1ec7n t\u00edch h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt h\u1ecdc \u1edf l\u1edbp m\u1ea5y?<\/h3>\n<p>Di\u1ec7n t\u00edch xung quanh v\u00e0 to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c h\u1ecdc \u1edf To\u00e1n l\u1edbp 5.<\/p>\n<p><script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt l\u00e0 g\u00ec?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Stp = 2(a + b) \u00d7 h + 2ab, t\u1ee9c di\u1ec7n t\u00edch xung quanh c\u1ed9ng di\u1ec7n t\u00edch hai \u0111\u00e1y.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Di\u1ec7n t\u00edch xung quanh h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt t\u00ednh th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"L\u1ea5y chu vi \u0111\u00e1y nh\u00e2n v\u1edbi chi\u1ec1u cao: Sxq = 2(a + b) \u00d7 h.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Di\u1ec7n t\u00edch xung quanh v\u00e0 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n kh\u00e1c nhau th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Di\u1ec7n t\u00edch xung quanh ch\u1ec9 g\u1ed3m 4 m\u1eb7t b\u00ean; di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n g\u1ed3m 4 m\u1eb7t b\u00ean v\u00e0 2 m\u1eb7t \u0111\u00e1y.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Bi\u1ebft di\u1ec7n t\u00edch xung quanh, t\u00ecm chi\u1ec1u cao th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Chia di\u1ec7n t\u00edch xung quanh cho chu vi \u0111\u00e1y: h = Sxq : [2(a + b)].\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"H\u1ed9p kh\u00f4ng n\u1eafp t\u00ednh di\u1ec7n t\u00edch th\u1ebf n\u00e0o?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"C\u1ed9ng di\u1ec7n t\u00edch xung quanh v\u1edbi di\u1ec7n t\u00edch m\u1ed9t \u0111\u00e1y: S = 2(a + b) \u00d7 h + a \u00d7 b.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Di\u1ec7n t\u00edch h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt h\u1ecdc \u1edf l\u1edbp m\u1ea5y?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Di\u1ec7n t\u00edch xung quanh v\u00e0 to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c h\u1ecdc \u1edf To\u00e1n l\u1edbp 5.\"\n      }\n    }\n  ]\n}\n<\/script><\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Di\u1ec7n t\u00edch xung quanh h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt b\u1eb1ng chu vi \u0111\u00e1y nh\u00e2n chi\u1ec1u cao, c\u00f2n di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n c\u1ed9ng th\u00eam di\u1ec7n t\u00edch hai \u0111\u00e1y. N\u1eafm ch\u1eafc hai c\u00f4ng th\u1ee9c v\u00e0 c\u00e1ch x\u1eed l\u00fd h\u1ed9p kh\u00f4ng n\u1eafp l\u00e0 \u0111\u1ee7 \u0111\u1ec3 gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n l\u1edbp 5 v\u00e0 nhi\u1ec1u b\u00e0i to\u00e1n th\u1ef1c t\u1ebf nh\u01b0 s\u01a1n t\u01b0\u1eddng, l\u00e0m th\u00f9ng. Tham kh\u1ea3o th\u00eam b\u00e0i <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dien-tich-hinh-chu-nhat\/\">di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt<\/a> v\u00e0 <a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/the-tich-hinh-lap-phuong\/\">th\u1ec3 t\u00edch h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt b\u1eb1ng di\u1ec7n t\u00edch xung quanh c\u1ed9ng di\u1ec7n t\u00edch hai \u0111\u00e1y: Stp = 2(a + b) \u00d7 h + 2ab, v\u1edbi a l\u00e0 chi\u1ec1u d\u00e0i, b l\u00e0 chi\u1ec1u r\u1ed9ng, h l\u00e0 chi\u1ec1u cao. Di\u1ec7n t\u00edch xung quanh (4 m\u1eb7t b\u00ean) l\u00e0 Sxq = 2(a + b) \u00d7 h. [&hellip;]<\/p>\n","protected":false},"author":101,"featured_media":300692,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt","_yoast_wpseo_title":"Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt: C\u00f4ng th\u1ee9c, v\u00ed d\u1ee5 l\u1edbp 5","_yoast_wpseo_metadesc":"Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt Stp = 2(a + b)h + 2ab, di\u1ec7n t\u00edch xung quanh Sxq = 2(a + b)h. C\u00e1ch t\u00ecm chi\u1ec1u cao, h\u1ed9p kh\u00f4ng n\u1eafp v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i.","footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-300691","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>Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt: C\u00f4ng th\u1ee9c, v\u00ed d\u1ee5 l\u1edbp 5<\/title>\n<meta name=\"description\" content=\"Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt Stp = 2(a + b)h + 2ab, di\u1ec7n t\u00edch xung quanh Sxq = 2(a + b)h. C\u00e1ch t\u00ecm chi\u1ec1u cao, h\u1ed9p kh\u00f4ng n\u1eafp v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/dien-tich-hinh-hop-chu-nhat\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Di\u1ec7n T\u00edch To\u00e0n Ph\u1ea7n H\u00ecnh H\u1ed9p Ch\u1eef Nh\u1eadt: C\u00f4ng Th\u1ee9c V\u00e0 V\u00ed D\u1ee5 Chi Ti\u1ebft\" \/>\n<meta property=\"og:description\" content=\"Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt Stp = 2(a + b)h + 2ab, di\u1ec7n t\u00edch xung quanh Sxq = 2(a + b)h. 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