{"id":569097,"date":"2026-07-27T09:29:53","date_gmt":"2026-07-27T02:29:53","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=569097"},"modified":"2026-07-27T09:29:53","modified_gmt":"2026-07-27T02:29:53","slug":"hinh-binh-hanh-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/hinh-binh-hanh-la-gi\/","title":{"rendered":"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec? T\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u v\u00e0 c\u00f4ng th\u1ee9c"},"content":{"rendered":"<p style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 t\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song v\u1edbi nhau; trong h\u00ecnh b\u00ecnh h\u00e0nh, c\u00e1c c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau v\u00e0 hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng. Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng c\u1ea1nh \u0111\u00e1y nh\u00e2n chi\u1ec1u cao. \u0110\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c To\u00e1n h\u00ecnh h\u1ecdc l\u1edbp 4 v\u00e0 l\u1edbp 8. B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y <b>h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec<\/b>, t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft, c\u00f4ng th\u1ee9c chu vi \u2013 di\u1ec7n t\u00edch v\u00e0 nhi\u1ec1u b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i chi ti\u1ebft t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 b\u1ea1n h\u1ecdc v\u00e0 \u00f4n t\u1eadp hi\u1ec7u qu\u1ea3.<\/p>\n<h2 style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<\/h2>\n<p style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 m\u1ed9t t\u1ee9 gi\u00e1c c\u00f3 c\u00e1c c\u1ea1nh \u0111\u1ed1i song song. N\u00f3i c\u00e1ch kh\u00e1c, t\u1ee9 gi\u00e1c ABCD l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh khi AB song song v\u1edbi CD v\u00e0 AD song song v\u1edbi BC. H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh thang, c\u1ee5 th\u1ec3 l\u00e0 h\u00ecnh thang c\u00f3 hai c\u1ea1nh b\u00ean c\u0169ng song song. Nhi\u1ec1u h\u00ecnh quen thu\u1ed9c nh\u01b0 h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh thoi v\u00e0 h\u00ecnh vu\u00f4ng \u0111\u1ec1u l\u00e0 nh\u1eefng d\u1ea1ng \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-570547\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-3.jpg\" alt=\"hinh-binh-hanh-la-gi-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2 style=\"text-align: justify;\">T\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh<\/h2>\n<p style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh h\u1ecdc quan tr\u1ecdng li\u00ean quan \u0111\u1ebfn c\u1ea1nh, g\u00f3c v\u00e0 \u0111\u01b0\u1eddng ch\u00e9o. Nh\u1eefng t\u00ednh ch\u1ea5t n\u00e0y gi\u00fap nh\u1eadn bi\u1ebft h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n h\u00ecnh h\u1ecdc li\u00ean quan.<\/p>\n<ul style=\"text-align: justify;\">\n<li>C\u00e1c c\u1ea1nh \u0111\u1ed1i: Hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, t\u1ee9c AB = CD v\u00e0 AD = BC.<\/li>\n<li>C\u00e1c g\u00f3c \u0111\u1ed1i: Hai g\u00f3c \u0111\u1ed1i c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng nhau.<\/li>\n<li>Hai \u0111\u01b0\u1eddng ch\u00e9o: Hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng.<\/li>\n<li>Hai g\u00f3c k\u1ec1 m\u1ed9t c\u1ea1nh: Hai g\u00f3c k\u1ec1 nhau c\u00f3 t\u1ed5ng s\u1ed1 \u0111o b\u1eb1ng 180\u00b0.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">C\u00e1c t\u00ednh ch\u1ea5t tr\u00ean c\u00f2n c\u00f3 th\u1ec3 d\u00f9ng ng\u01b0\u1ee3c l\u1ea1i l\u00e0m c\u0103n c\u1ee9 ch\u1ee9ng minh, v\u00ed d\u1ee5 khi bi\u1ebft hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng th\u00ec c\u00f3 th\u1ec3 kh\u1eb3ng \u0111\u1ecbnh t\u1ee9 gi\u00e1c \u0111\u00f3 l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<h2 style=\"text-align: justify;\">D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft h\u00ecnh b\u00ecnh h\u00e0nh<\/h2>\n<p style=\"text-align: justify;\">M\u1ed9t t\u1ee9 gi\u00e1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh n\u1ebfu th\u1ecfa m\u00e3n m\u1ed9t trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u1eb7c tr\u01b0ng v\u1ec1 c\u1ea1nh, g\u00f3c ho\u1eb7c \u0111\u01b0\u1eddng ch\u00e9o. C\u00e1c d\u1ea5u hi\u1ec7u n\u00e0y gi\u00fap nh\u1eadn bi\u1ebft nhanh m\u1ed9t t\u1ee9 gi\u00e1c c\u00f3 ph\u1ea3i l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh hay kh\u00f4ng.<\/p>\n<ul style=\"text-align: justify;\">\n<li>T\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song.<\/li>\n<li>T\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau.<\/li>\n<li>T\u1ee9 gi\u00e1c c\u00f3 m\u1ed9t c\u1eb7p c\u1ea1nh \u0111\u1ed1i v\u1eeba song song v\u1eeba b\u1eb1ng nhau.<\/li>\n<li>T\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau.<\/li>\n<li>T\u1ee9 gi\u00e1c c\u00f3 hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng.<\/li>\n<\/ul>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-570546\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-2.jpg\" alt=\"hinh-binh-hanh-la-gi-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2 style=\"text-align: justify;\">Ph\u00e2n bi\u1ec7t h\u00ecnh b\u00ecnh h\u00e0nh v\u1edbi h\u00ecnh thoi, h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh vu\u00f4ng<\/h2>\n<p style=\"text-align: justify;\">H\u00ecnh thoi, h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 h\u00ecnh vu\u00f4ng \u0111\u1ec1u l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1eb7c bi\u1ec7t, n\u00ean ch\u00fang th\u1eeba h\u01b0\u1edfng m\u1ecdi t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh v\u00e0 c\u00f3 th\u00eam \u0111i\u1ec1u ki\u1ec7n ri\u00eang. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft \u0111i\u1ec3m kh\u00e1c bi\u1ec7t \u0111\u1ec3 b\u1ea1n d\u1ec5 so s\u00e1nh.<\/p>\n<table>\n<thead>\n<tr>\n<th>H\u00ecnh<\/th>\n<th>\u0110i\u1ec1u ki\u1ec7n th\u00eam so v\u1edbi h\u00ecnh b\u00ecnh h\u00e0nh<\/th>\n<th>\u0110\u1eb7c \u0111i\u1ec3m \u0111\u01b0\u1eddng ch\u00e9o<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>H\u00ecnh b\u00ecnh h\u00e0nh<\/td>\n<td>Kh\u00f4ng th\u00eam \u0111i\u1ec1u ki\u1ec7n<\/td>\n<td>C\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng<\/td>\n<\/tr>\n<tr>\n<td>H\u00ecnh ch\u1eef nh\u1eadt<\/td>\n<td>C\u00f3 m\u1ed9t g\u00f3c vu\u00f4ng<\/td>\n<td>Hai \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau<\/td>\n<\/tr>\n<tr>\n<td>H\u00ecnh thoi<\/td>\n<td>C\u00f3 hai c\u1ea1nh k\u1ec1 b\u1eb1ng nhau<\/td>\n<td>Vu\u00f4ng g\u00f3c v\u00e0 l\u00e0 ph\u00e2n gi\u00e1c c\u00e1c g\u00f3c<\/td>\n<\/tr>\n<tr>\n<td>H\u00ecnh vu\u00f4ng<\/td>\n<td>V\u1eeba c\u00f3 g\u00f3c vu\u00f4ng v\u1eeba c\u00f3 hai c\u1ea1nh k\u1ec1 b\u1eb1ng nhau<\/td>\n<td>B\u1eb1ng nhau v\u00e0 vu\u00f4ng g\u00f3c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 style=\"text-align: justify;\">C\u00f4ng th\u1ee9c chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh<\/h2>\n<p style=\"text-align: justify;\">C\u00e1c c\u00f4ng th\u1ee9c t\u00ednh chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh bi\u1ec3u di\u1ec5n m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa c\u00e1c y\u1ebfu t\u1ed1 h\u00ecnh h\u1ecdc c\u01a1 b\u1ea3n c\u1ee7a h\u00ecnh. Vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c c\u00f4ng th\u1ee9c n\u00e0y l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n li\u00ean quan \u0111\u1ebfn h\u00ecnh h\u1ecdc ph\u1eb3ng, \u0111o l\u01b0\u1eddng v\u00e0 \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf.<\/p>\n<ul style=\"text-align: justify;\">\n<li>Chu vi: P = 2 \u00d7 (a + b), v\u1edbi a v\u00e0 b l\u00e0 \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1.<\/li>\n<li>Di\u1ec7n t\u00edch: S = a \u00d7 h, v\u1edbi a l\u00e0 c\u1ea1nh \u0111\u00e1y v\u00e0 h l\u00e0 chi\u1ec1u cao \u1ee9ng v\u1edbi c\u1ea1nh \u0111\u00e1y \u0111\u00f3.<\/li>\n<\/ul>\n<p style=\"text-align: justify;\">L\u01b0u \u00fd quan tr\u1ecdng: chi\u1ec1u cao h ph\u1ea3i l\u00e0 kho\u1ea3ng c\u00e1ch vu\u00f4ng g\u00f3c t\u1eeb c\u1ea1nh \u0111\u1ed1i xu\u1ed1ng c\u1ea1nh \u0111\u00e1y, kh\u00f4ng ph\u1ea3i \u0111\u1ed9 d\u00e0i c\u1ea1nh b\u00ean. \u0110\u00e2y l\u00e0 l\u1ed7i th\u01b0\u1eddng g\u1eb7p khi h\u1ecdc sinh nh\u1ea7m c\u1ea1nh b\u00ean v\u1edbi chi\u1ec1u cao, d\u1eabn \u0111\u1ebfn t\u00ednh sai di\u1ec7n t\u00edch.<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0110\u1ea1i l\u01b0\u1ee3ng<\/th>\n<th>C\u00f4ng th\u1ee9c<\/th>\n<th>Suy ra<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Chu vi P<\/td>\n<td>P = 2 \u00d7 (a + b)<\/td>\n<td>a = P\/2 \u2212 b<\/td>\n<\/tr>\n<tr>\n<td>Di\u1ec7n t\u00edch S<\/td>\n<td>S = a \u00d7 h<\/td>\n<td>h = S\/a ho\u1eb7c a = S\/h<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 style=\"text-align: justify;\">V\u00ed d\u1ee5 v\u00e0 b\u00e0i t\u1eadp v\u1eadn d\u1ee5ng c\u00f3 l\u1eddi gi\u1ea3i<\/h2>\n<p style=\"text-align: justify;\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c b\u00e0i t\u1eadp \u0111\u01b0\u1ee3c gi\u1ea3i chi ti\u1ebft t\u1eebng b\u01b0\u1edbc, \u0111i t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn v\u1eadn d\u1ee5ng, gi\u00fap b\u1ea1n n\u1eafm ch\u1eafc c\u00e1ch \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<p style=\"text-align: justify;\"><b>B\u00e0i 1:<\/b> H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 c\u1ea1nh \u0111\u00e1y 8 cm, chi\u1ec1u cao 5 cm. T\u00ednh di\u1ec7n t\u00edch.<\/p>\n<p style=\"text-align: justify;\"><i>L\u1eddi gi\u1ea3i:<\/i> B\u01b0\u1edbc 1 \u2013 X\u00e1c \u0111\u1ecbnh d\u1eef ki\u1ec7n: a = 8 cm, h = 5 cm. B\u01b0\u1edbc 2 \u2013 \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c di\u1ec7n t\u00edch S = a \u00d7 h. B\u01b0\u1edbc 3 \u2013 Thay s\u1ed1: S = 8 \u00d7 5 = 40. V\u1eady di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 40 cm\u00b2.<\/p>\n<p style=\"text-align: justify;\"><b>B\u00e0i 2:<\/b> H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 hai c\u1ea1nh k\u1ec1 6 cm v\u00e0 9 cm. T\u00ednh chu vi.<\/p>\n<p style=\"text-align: justify;\"><i>L\u1eddi gi\u1ea3i:<\/i> B\u01b0\u1edbc 1 \u2013 X\u00e1c \u0111\u1ecbnh hai c\u1ea1nh k\u1ec1: a = 6 cm, b = 9 cm. B\u01b0\u1edbc 2 \u2013 \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c chu vi P = 2 \u00d7 (a + b). B\u01b0\u1edbc 3 \u2013 Thay s\u1ed1: P = 2 \u00d7 (6 + 9) = 2 \u00d7 15 = 30. V\u1eady chu vi l\u00e0 30 cm.<\/p>\n<p style=\"text-align: justify;\"><b>B\u00e0i 3:<\/b> Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh 60 cm\u00b2, c\u1ea1nh \u0111\u00e1y 12 cm. T\u00ednh chi\u1ec1u cao.<\/p>\n<p style=\"text-align: justify;\"><i>L\u1eddi gi\u1ea3i:<\/i> B\u01b0\u1edbc 1 \u2013 T\u1eeb c\u00f4ng th\u1ee9c S = a \u00d7 h suy ra h = S\/a. B\u01b0\u1edbc 2 \u2013 Thay s\u1ed1: h = 60 \/ 12 = 5. V\u1eady chi\u1ec1u cao \u1ee9ng v\u1edbi c\u1ea1nh \u0111\u00e1y 12 cm l\u00e0 5 cm.<\/p>\n<p style=\"text-align: justify;\"><b>B\u00e0i 4:<\/b> M\u1ed9t m\u1ea3nh \u0111\u1ea5t h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 chu vi 100 m, m\u1ed9t c\u1ea1nh d\u00e0i 30 m. T\u00ednh c\u1ea1nh c\u00f2n l\u1ea1i; n\u1ebfu chi\u1ec1u cao \u1ee9ng v\u1edbi c\u1ea1nh 30 m l\u00e0 18 m th\u00ec di\u1ec7n t\u00edch m\u1ea3nh \u0111\u1ea5t l\u00e0 bao nhi\u00eau?<\/p>\n<p style=\"text-align: justify;\"><i>L\u1eddi gi\u1ea3i:<\/i> B\u01b0\u1edbc 1 \u2013 T\u1eeb P = 2 \u00d7 (a + b) = 100 suy ra a + b = 50. B\u01b0\u1edbc 2 \u2013 Bi\u1ebft a = 30 n\u00ean c\u1ea1nh c\u00f2n l\u1ea1i b = 50 \u2212 30 = 20 m. B\u01b0\u1edbc 3 \u2013 T\u00ednh di\u1ec7n t\u00edch l\u1ea5y c\u1ea1nh \u0111\u00e1y 30 m v\u00e0 chi\u1ec1u cao 18 m: S = 30 \u00d7 18 = 540. V\u1eady c\u1ea1nh c\u00f2n l\u1ea1i l\u00e0 20 m v\u00e0 di\u1ec7n t\u00edch l\u00e0 540 m\u00b2.<\/p>\n<p style=\"text-align: justify;\"><b>B\u00e0i 5 (tr\u1eafc nghi\u1ec7m):<\/b> Hai \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh b\u00ecnh h\u00e0nh c\u1eaft nhau t\u1ea1i \u0111\u00e2u? A. M\u1ed9t \u0111\u1ec9nh &nbsp; B. Trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng &nbsp; C. Kh\u00f4ng c\u1eaft nhau &nbsp; D. Ngo\u00e0i h\u00ecnh.<\/p>\n<p style=\"text-align: justify;\"><i>L\u1eddi gi\u1ea3i:<\/i> Theo t\u00ednh ch\u1ea5t, hai \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh b\u00ecnh h\u00e0nh c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng. \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-570545\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-1.jpg\" alt=\"hinh-binh-hanh-la-gi-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2026\/07\/hinh-binh-hanh-la-gi-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2 style=\"text-align: justify;\">\u1ee8ng d\u1ee5ng c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh trong th\u1ef1c t\u1ebf<\/h2>\n<p style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh xu\u1ea5t hi\u1ec7n ph\u1ed5 bi\u1ebfn trong \u0111\u1eddi s\u1ed1ng v\u00e0 k\u1ef9 thu\u1eadt nh\u1edd \u0111\u1eb7c \u0111i\u1ec3m c\u1ea1nh \u0111\u1ed1i song song. M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 quen thu\u1ed9c:<\/p>\n<ul style=\"text-align: justify;\">\n<li>Thi\u1ebft k\u1ebf c\u1ea7u thang, m\u00e1i nh\u00e0, khung c\u1eeda v\u00e0 c\u00e1c k\u1ebft c\u1ea5u ch\u1ecbu l\u1ef1c nghi\u00eang.<\/li>\n<li>C\u01a1 c\u1ea5u b\u1ed1n thanh (four-bar linkage) trong m\u00e1y m\u00f3c, v\u00ed d\u1ee5 tay n\u00e2ng b\u00e0n ho\u1eb7c k\u1ec7.<\/li>\n<li>T\u00ednh di\u1ec7n t\u00edch m\u1ea3nh \u0111\u1ea5t, m\u1eb7t s\u00e0n c\u00f3 d\u1ea1ng h\u00ecnh b\u00ecnh h\u00e0nh trong \u0111o \u0111\u1ea1c.<\/li>\n<li>Bi\u1ec3u di\u1ec5n vect\u01a1 trong V\u1eadt l\u00fd theo quy t\u1eafc h\u00ecnh b\u00ecnh h\u00e0nh \u0111\u1ec3 c\u1ed9ng l\u1ef1c.<\/li>\n<\/ul>\n<h2 style=\"text-align: justify;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 h\u00ecnh b\u00ecnh h\u00e0nh<\/h2>\n<h3 style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<\/h3>\n<p style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 t\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song. Trong h\u00ecnh b\u00ecnh h\u00e0nh, c\u00e1c c\u1ea1nh \u0111\u1ed1i v\u00e0 g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau, hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng.<\/p>\n<h3 style=\"text-align: justify;\">T\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?<\/h3>\n<p style=\"text-align: justify;\">C\u00e1c c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau, hai g\u00f3c k\u1ec1 m\u1ed9t c\u1ea1nh b\u00f9 nhau v\u00e0 hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng.<\/p>\n<h3 style=\"text-align: justify;\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh?<\/h3>\n<p style=\"text-align: justify;\">Di\u1ec7n t\u00edch b\u1eb1ng c\u1ea1nh \u0111\u00e1y nh\u00e2n chi\u1ec1u cao: S = a \u00d7 h, trong \u0111\u00f3 h l\u00e0 kho\u1ea3ng c\u00e1ch vu\u00f4ng g\u00f3c t\u1eeb c\u1ea1nh \u0111\u1ed1i xu\u1ed1ng c\u1ea1nh \u0111\u00e1y a.<\/p>\n<h3 style=\"text-align: justify;\">C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh b\u00ecnh h\u00e0nh?<\/h3>\n<p style=\"text-align: justify;\">Chu vi b\u1eb1ng hai l\u1ea7n t\u1ed5ng hai c\u1ea1nh k\u1ec1: P = 2 \u00d7 (a + b), v\u1edbi a v\u00e0 b l\u00e0 \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1 nhau.<\/p>\n<h3 style=\"text-align: justify;\">L\u00e0m sao nh\u1eadn bi\u1ebft m\u1ed9t t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh?<\/h3>\n<p style=\"text-align: justify;\">Ch\u1ec9 c\u1ea7n th\u1ecfa m\u1ed9t trong c\u00e1c d\u1ea5u hi\u1ec7u: hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song, hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, m\u1ed9t c\u1eb7p c\u1ea1nh \u0111\u1ed1i v\u1eeba song song v\u1eeba b\u1eb1ng nhau, hai c\u1eb7p g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau, ho\u1eb7c hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng.<\/p>\n<h3 style=\"text-align: justify;\">H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 ph\u1ea3i h\u00ecnh thang kh\u00f4ng?<\/h3>\n<p style=\"text-align: justify;\">C\u00f3, h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh thang, \u0111\u00f3 l\u00e0 h\u00ecnh thang c\u00f3 c\u1ea3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song.<\/p>\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 t\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song. Trong h\u00ecnh b\u00ecnh h\u00e0nh, c\u00e1c c\u1ea1nh \u0111\u1ed1i v\u00e0 g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau, hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng.\"}},{\"@type\":\"Question\",\"name\":\"T\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00e1c c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau, hai g\u00f3c k\u1ec1 m\u1ed9t c\u1ea1nh b\u00f9 nhau v\u00e0 hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng.\"}},{\"@type\":\"Question\",\"name\":\"C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Di\u1ec7n t\u00edch b\u1eb1ng c\u1ea1nh \u0111\u00e1y nh\u00e2n chi\u1ec1u cao: S = a \u00d7 h, trong \u0111\u00f3 h l\u00e0 kho\u1ea3ng c\u00e1ch vu\u00f4ng g\u00f3c t\u1eeb c\u1ea1nh \u0111\u1ed1i xu\u1ed1ng c\u1ea1nh \u0111\u00e1y a.\"}},{\"@type\":\"Question\",\"name\":\"C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh b\u00ecnh h\u00e0nh?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Chu vi b\u1eb1ng hai l\u1ea7n t\u1ed5ng hai c\u1ea1nh k\u1ec1: P = 2 \u00d7 (a + b), v\u1edbi a v\u00e0 b l\u00e0 \u0111\u1ed9 d\u00e0i hai c\u1ea1nh k\u1ec1 nhau.\"}},{\"@type\":\"Question\",\"name\":\"L\u00e0m sao nh\u1eadn bi\u1ebft m\u1ed9t t\u1ee9 gi\u00e1c l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Ch\u1ec9 c\u1ea7n th\u1ecfa m\u1ed9t trong c\u00e1c d\u1ea5u hi\u1ec7u: hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song, hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, m\u1ed9t c\u1eb7p c\u1ea1nh \u0111\u1ed1i v\u1eeba song song v\u1eeba b\u1eb1ng nhau, hai c\u1eb7p g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau, ho\u1eb7c hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m m\u1ed7i \u0111\u01b0\u1eddng.\"}},{\"@type\":\"Question\",\"name\":\"H\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 ph\u1ea3i h\u00ecnh thang kh\u00f4ng?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"C\u00f3, h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a h\u00ecnh thang, \u0111\u00f3 l\u00e0 h\u00ecnh thang c\u00f3 c\u1ea3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song.\"}}]}<\/script><\/p>\n<h2 style=\"text-align: justify;\">K\u1ebft lu\u1eadn<\/h2>\n<p style=\"text-align: justify;\">T\u00f3m l\u1ea1i, h\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 t\u1ee9 gi\u00e1c c\u00f3 c\u00e1c c\u1ea1nh \u0111\u1ed1i song song v\u00e0 b\u1eb1ng nhau, di\u1ec7n t\u00edch S = a \u00d7 h v\u00e0 chu vi P = 2 \u00d7 (a + b). N\u1eafm v\u1eefng t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft v\u00e0 luy\u1ec7n t\u1eadp c\u00e1c b\u00e0i to\u00e1n c\u00f3 l\u1eddi gi\u1ea3i s\u1ebd gi\u00fap b\u1ea1n gi\u1ea3i nhanh v\u00e0 ch\u00ednh x\u00e1c c\u00e1c d\u1ea1ng b\u00e0i h\u00ecnh h\u1ecdc ph\u1eb3ng li\u00ean quan \u0111\u1ebfn h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 t\u1ee9 gi\u00e1c c\u00f3 hai c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song v\u1edbi nhau; trong h\u00ecnh b\u00ecnh h\u00e0nh, c\u00e1c c\u1ea1nh \u0111\u1ed1i b\u1eb1ng nhau, c\u00e1c g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau v\u00e0 hai \u0111\u01b0\u1eddng ch\u00e9o c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111\u01b0\u1eddng. Di\u1ec7n t\u00edch h\u00ecnh b\u00ecnh h\u00e0nh b\u1eb1ng c\u1ea1nh \u0111\u00e1y nh\u00e2n chi\u1ec1u cao. \u0110\u00e2y l\u00e0 ki\u1ebfn [&hellip;]<\/p>\n","protected":false},"author":84,"featured_media":570544,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"h\u00ecnh b\u00ecnh h\u00e0nh","_yoast_wpseo_title":"H\u00ecnh b\u00ecnh h\u00e0nh: T\u00ednh ch\u1ea5t v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh","_yoast_wpseo_metadesc":"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec, t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft, c\u00f4ng th\u1ee9c chu vi di\u1ec7n t\u00edch v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i. Xem chi ti\u1ebft t\u1ea1i Ho\u00e0ng H\u00e0 Mobile.","footnotes":""},"categories":[29235,3910,30453],"tags":[],"class_list":["post-569097","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goc-to-mo","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: T\u00ednh ch\u1ea5t v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh<\/title>\n<meta name=\"description\" content=\"H\u00ecnh b\u00ecnh h\u00e0nh l\u00e0 g\u00ec, t\u00ednh ch\u1ea5t, d\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft, c\u00f4ng th\u1ee9c chu vi di\u1ec7n t\u00edch v\u00e0 b\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i. 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