{"id":297765,"date":"2023-12-27T20:33:37","date_gmt":"2023-12-27T13:33:37","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=297765"},"modified":"2026-03-07T20:43:45","modified_gmt":"2026-03-07T13:43:45","slug":"chu-vi-hinh-chu-nhat","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/chu-vi-hinh-chu-nhat\/","title":{"rendered":"C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt &#038; C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u1eeb A-Z"},"content":{"rendered":"<section id=\"cong-thuc-chu-vi\">\n<p style=\"text-align: justify;\">B\u00e0i vi\u1ebft n\u00e0y h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt, bao g\u1ed3m \u0111\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t, ph\u00e2n bi\u1ec7t v\u1edbi di\u1ec7n t\u00edch, h\u1ec7 th\u1ed1ng b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n t\u1edbi n\u00e2ng cao c\u00f3 \u0111\u00e1p \u00e1n, c\u00f4ng c\u1ee5 t\u00ednh online, \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n v\u00e0 gi\u1ea3i th\u00edch chuy\u00ean s\u00e2u gi\u00fap b\u1ea1n l\u00e0m ch\u1ee7 ki\u1ebfn th\u1ee9c. C\u00e1c c\u00e2u h\u1ecfi th\u1ef1c t\u1ebf \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p r\u00f5 r\u00e0ng, h\u1ed7 tr\u1ee3 h\u1ecdc sinh, gi\u00e1o vi\u00ean v\u00e0 b\u1ea5t c\u1ee9 ai c\u1ea7n \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng, h\u1ecdc t\u1eadp hay c\u00f4ng vi\u1ec7c.<\/p>\n<h2 style=\"text-align: justify;\">Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 g\u00ec? C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/h2>\n<p style=\"text-align: justify;\"><strong>Chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng t\u1ed5ng chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng nh\u00e2n v\u1edbi 2, t\u1ee9c l\u00e0 P = (a + b) \u00d7 2.<\/strong><\/p>\n<p style=\"text-align: justify;\">Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 t\u1ed5ng \u0111\u1ed9 d\u00e0i to\u00e0n b\u1ed9 b\u1ed1n c\u1ea1nh ngo\u00e0i c\u1ee7a m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt. C\u00f4ng th\u1ee9c n\u00e0y \u00e1p d\u1ee5ng cho m\u1ecdi h\u00ecnh ch\u1eef nh\u1eadt, kh\u00f4ng ph\u00e2n bi\u1ec7t k\u00edch th\u01b0\u1edbc, ch\u1ec9 c\u1ea7n bi\u1ebft chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng.<\/p>\n<div class=\"formula-box\" style=\"text-align: justify;\"><b>C\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t:<\/b><br \/>\n<b>P = (a + b) \u00d7 2<\/b><\/p>\n<ul>\n<li><b>P:<\/b>\u00a0Chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/li>\n<li><b>a:<\/b>\u00a0Chi\u1ec1u d\u00e0i (\u0111\u01a1n v\u1ecb cm, m, km&#8230;)<\/li>\n<li><b>b:<\/b>\u00a0Chi\u1ec1u r\u1ed9ng (\u0111\u01a1n v\u1ecb cm, m, km&#8230;)<\/li>\n<li>L\u01b0u \u00fd: \u0110\u01a1n v\u1ecb \u0111o c\u1ee7a a v\u00e0 b ph\u1ea3i gi\u1ed1ng nhau.<\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-299036 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<\/div>\n<p style=\"text-align: justify;\">\u00dd ngh\u0129a: Chu vi cho bi\u1ebft t\u1ed5ng \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng vi\u1ec1n bao quanh h\u00ecnh. Trong th\u1ef1c ti\u1ec5n, b\u1ea1n c\u1ea7n bi\u1ebft chu vi khi \u0111o chi\u1ec1u d\u00e0i d\u00e2y, v\u1eadt li\u1ec7u ho\u1eb7c h\u00e0ng r\u00e0o bao quanh khu v\u1ef1c h\u00ecnh ch\u1eef nh\u1eadt.<\/p>\n<p style=\"text-align: justify;\"><b>V\u00ed d\u1ee5:<\/b>\u00a0M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 10 m, chi\u1ec1u r\u1ed9ng 6 m.<br \/>\nChu vi = (10 + 6) \u00d7 2 = 16 \u00d7 2 = 32 m.<\/p>\n<div class=\"section-expand\" style=\"text-align: justify;\"><strong>Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u1edbp 3, 4, 5:<\/strong>\u00a0H\u1ecdc sinh c\u00e1c l\u1edbp n\u00e0y th\u01b0\u1eddng \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n tr\u00ean. V\u00ed d\u1ee5, v\u1edbi chi\u1ec1u d\u00e0i 12 cm, chi\u1ec1u r\u1ed9ng 8 cm, chu vi = (12 + 8) \u00d7 2 = 40 cm.<\/div>\n<\/section>\n<section id=\"cong-cu-online\">\n<h2>C\u00f4ng c\u1ee5 t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt online<\/h2>\n<p><strong>B\u1ea1n c\u00f3 th\u1ec3 t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt tr\u1ef1c tuy\u1ebfn b\u1eb1ng c\u00e1ch nh\u1eadp chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng, k\u1ebft qu\u1ea3 s\u1ebd hi\u1ec3n th\u1ecb t\u1ee9c th\u00ec.<\/strong><\/p>\n<div class=\"calculator\">\n<div id=\"perimeter-result\" class=\"calculator-result\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"size-full wp-image-299037 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-2\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-2-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/div>\n<\/div>\n<p>C\u00f4ng c\u1ee5 tr\u00ean gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m th\u1eddi gian, tr\u00e1nh nh\u1ea7m l\u1eabn khi t\u00ednh to\u00e1n th\u1ee7 c\u00f4ng. \u0110\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho h\u1ecdc sinh, gi\u00e1o vi\u00ean v\u00e0 nh\u1eefng ai c\u1ea7n x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i v\u1eadt li\u1ec7u, h\u00e0ng r\u00e0o, khung tranh, v.v.<\/p>\n<\/section>\n<section id=\"phan-biet\">\n<h2>Ph\u00e2n bi\u1ec7t chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt<\/h2>\n<p><strong>Chu vi \u0111o t\u1ed5ng chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng bao h\u00ecnh ch\u1eef nh\u1eadt, c\u00f2n di\u1ec7n t\u00edch \u0111o ph\u1ea7n kh\u00f4ng gian b\u00ean trong h\u00ecnh.<\/strong><\/p>\n<p>\u0110\u00e2y l\u00e0 hai kh\u00e1i ni\u1ec7m d\u1ec5 nh\u1ea7m l\u1eabn nh\u01b0ng ho\u00e0n to\u00e0n kh\u00e1c nhau v\u1ec1 m\u1eb7t to\u00e1n h\u1ecdc v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. Chu vi d\u00f9ng \u0111\u01a1n v\u1ecb chi\u1ec1u d\u00e0i (cm, m, km\u2026), c\u00f2n di\u1ec7n t\u00edch d\u00f9ng \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch (cm\u00b2, m\u00b2, km\u00b2\u2026).<\/p>\n<table>\n<tbody>\n<tr>\n<th>Ti\u00eau ch\u00ed<\/th>\n<th>Chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/th>\n<th>Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt<\/th>\n<\/tr>\n<tr>\n<td>Kh\u00e1i ni\u1ec7m<\/td>\n<td>T\u1ed5ng \u0111\u1ed9 d\u00e0i b\u1ed1n c\u1ea1nh ngo\u00e0i<\/td>\n<td>Ph\u1ea7n kh\u00f4ng gian b\u00ean trong<\/td>\n<\/tr>\n<tr>\n<td>C\u00f4ng th\u1ee9c<\/td>\n<td>P = (a + b) \u00d7 2<\/td>\n<td>S = a \u00d7 b<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u01a1n v\u1ecb<\/td>\n<td>cm, m, km, &#8230;<\/td>\n<td>cm\u00b2, m\u00b2, km\u00b2, &#8230;<\/td>\n<\/tr>\n<tr>\n<td>\u1ee8ng d\u1ee5ng<\/td>\n<td>\u0110o v\u1eadt li\u1ec7u bao quanh, d\u00e2y, h\u00e0ng r\u00e0o<\/td>\n<td>T\u00ednh l\u01b0\u1ee3ng g\u1ea1ch l\u00e1t, s\u01a1n t\u01b0\u1eddng, th\u1ea3m tr\u1ea3i s\u00e0n<\/td>\n<\/tr>\n<tr>\n<td>V\u00ed d\u1ee5<\/td>\n<td>Chu vi v\u01b0\u1eddn = t\u1ed5ng chi\u1ec1u d\u00e0i h\u00e0ng r\u00e0o<\/td>\n<td>Di\u1ec7n t\u00edch v\u01b0\u1eddn = s\u1ed1 m\u00e9t vu\u00f4ng \u0111\u1ea5t tr\u1ed3ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<\/section>\n<section><\/section>\n<section><b>L\u01b0u \u00fd:<\/b>\u00a0Kh\u00f4ng nh\u1ea7m l\u1eabn hai kh\u00e1i ni\u1ec7m n\u00e0y khi \u00e1p d\u1ee5ng v\u00e0o th\u1ef1c t\u1ebf. Mua v\u1eadt li\u1ec7u bao quanh th\u00ec c\u1ea7n chu vi, c\u00f2n l\u00e1t n\u1ec1n, s\u01a1n t\u01b0\u1eddng\u2026 th\u00ec c\u1ea7n di\u1ec7n t\u00edch.<\/section>\n<section id=\"luu-y\">\n<h2>Nh\u1eefng l\u01b0u \u00fd quan tr\u1ecdng khi t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/h2>\n<p><strong>\u0110\u1ea3m b\u1ea3o chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng c\u00f9ng \u0111\u01a1n v\u1ecb \u0111o, \u00e1p d\u1ee5ng \u0111\u00fang c\u00f4ng th\u1ee9c, v\u00e0 ki\u1ec3m tra k\u1ef9 \u0111\u00e1p s\u1ed1.<\/strong><\/p>\n<ul>\n<li><b>Th\u1ed1ng nh\u1ea5t \u0111\u01a1n v\u1ecb \u0111o:<\/b>\u00a0Kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ed9ng tr\u1eeb c\u00e1c s\u1ed1 \u0111o kh\u00e1c \u0111\u01a1n v\u1ecb. Lu\u00f4n quy \u0111\u1ed5i sang c\u00f9ng \u0111\u01a1n v\u1ecb tr\u01b0\u1edbc khi t\u00ednh.<\/li>\n<li><b>N\u1eeda chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 g\u00ec?<\/b>\u00a0N\u1eeda chu vi l\u00e0 t\u1ed5ng chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng (n\u1eeda chu vi = a + b), th\u01b0\u1eddng d\u00f9ng khi gi\u1ea3i c\u00e1c b\u00e0i to\u00e1n ng\u01b0\u1ee3c.<\/li>\n<li><b>Kh\u00f4ng nh\u1ea7m l\u1eabn v\u1edbi di\u1ec7n t\u00edch:<\/b>\u00a0Chu vi ch\u1ec9 \u0111o chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng bao quanh, kh\u00f4ng li\u00ean quan t\u1edbi ph\u1ea7n kh\u00f4ng gian b\u00ean trong.<\/li>\n<li><b>Kh\u00f4ng \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c chu vi h\u00ecnh ch\u1eef nh\u1eadt cho c\u00e1c h\u00ecnh kh\u00e1c:<\/b>\u00a0M\u1ed7i h\u00ecnh c\u00f3 c\u00f4ng th\u1ee9c ri\u00eang bi\u1ec7t, v\u00ed d\u1ee5 h\u00ecnh vu\u00f4ng, tam gi\u00e1c, tr\u00f2n\u2026<\/li>\n<li><b>Ch\u00fa \u00fd \u0111\u01a1n v\u1ecb k\u1ebft qu\u1ea3:<\/b>\u00a0K\u1ebft qu\u1ea3 chu vi ph\u1ea3i c\u00f3 \u0111\u01a1n v\u1ecb l\u00e0 \u0111\u1ed9 d\u00e0i, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng l\u1ea5y \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch.<\/li>\n<li><b>Ki\u1ec3m tra l\u1ea1i \u0111\u00e1p s\u1ed1:<\/b>\u00a0Sau khi t\u00ednh, n\u00ean so s\u00e1nh v\u1edbi th\u1ef1c t\u1ebf ho\u1eb7c ki\u1ec3m tra l\u1ea1i c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 gi\u1ea3m nh\u1ea7m l\u1eabn.<\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"size-full wp-image-299038 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-3\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-3-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<div class=\"alert\"><b>L\u1eddi khuy\u00ean chuy\u00ean gia:<\/b>\u00a0Khi t\u00ednh to\u00e1n, h\u00e3y \u0111\u1eb7t c\u00f4ng th\u1ee9c ra gi\u1ea5y, ghi r\u00f5 \u0111\u01a1n v\u1ecb, t\u00ednh t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 tr\u00e1nh sai s\u00f3t, \u0111\u1eb7c bi\u1ec7t v\u1edbi c\u00e1c b\u00e0i to\u00e1n c\u00f3 nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n ph\u1ee5.<\/div>\n<\/section>\n<section id=\"dang-bai-tap\">\n<h2>C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt (c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft)<\/h2>\n<h3>D\u1ea1ng 1: Bi\u1ebft chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng<\/h3>\n<p><strong>Ch\u1ec9 c\u1ea7n c\u1ed9ng chi\u1ec1u d\u00e0i v\u1edbi chi\u1ec1u r\u1ed9ng r\u1ed3i nh\u00e2n 2 \u0111\u1ec3 t\u00ecm chu vi.<\/strong><\/p>\n<div class=\"formula-box\"><b>V\u00ed d\u1ee5 1:<\/b> H\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 18 cm, chi\u1ec1u r\u1ed9ng 7 cm.<\/div>\n<div class=\"formula-box\">Chu vi = (18 + 7) \u00d7 2 = 25 \u00d7 2 = 50 cm.<\/div>\n<h3>D\u1ea1ng 2: Bi\u1ebft chi\u1ec1u d\u00e0i v\u00e0 chu vi, t\u00ecm chi\u1ec1u r\u1ed9ng<\/h3>\n<p><strong>Chi\u1ec1u r\u1ed9ng = (chu vi : 2) \u2013 chi\u1ec1u d\u00e0i.<\/strong><\/p>\n<div class=\"formula-box\"><b>V\u00ed d\u1ee5 2:<\/b> Chu vi 60 cm, chi\u1ec1u d\u00e0i 22 cm.<\/div>\n<div class=\"formula-box\">N\u1eeda chu vi = 60 : 2 = 30 cm.<\/div>\n<div class=\"formula-box\">Chi\u1ec1u r\u1ed9ng = 30 \u2013 22 = 8 cm.<\/div>\n<div><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-299040 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/div>\n<h3>D\u1ea1ng 3: Bi\u1ebft chu vi v\u00e0 quan h\u1ec7 c\u00e1c c\u1ea1nh (t\u1ed5ng, hi\u1ec7u, t\u1ec9 s\u1ed1)<\/h3>\n<p><strong>S\u1eed d\u1ee5ng h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh ho\u1eb7c bi\u1ebfn \u0111\u1ed5i c\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ecm c\u00e1c c\u1ea1nh.<\/strong><\/p>\n<div class=\"formula-box\"><b>V\u00ed d\u1ee5 3:<\/b>\u00a0Chu vi 54 cm, chi\u1ec1u d\u00e0i h\u01a1n chi\u1ec1u r\u1ed9ng 6 cm.<br \/>\nG\u1ecdi chi\u1ec1u r\u1ed9ng l\u00e0 b (cm), chi\u1ec1u d\u00e0i l\u00e0 b + 6.<br \/>\n(b + b + 6) \u00d7 2 = 54 \u2192 (2b + 6) \u00d7 2 = 54 \u2192 2b + 6 = 27 \u2192 2b = 21 \u2192 b = 10,5 cm.<br \/>\nChi\u1ec1u d\u00e0i = 10,5 + 6 = 16,5 cm.<\/div>\n<h3>D\u1ea1ng 4: B\u00e0i to\u00e1n t\u1ec9 s\u1ed1<\/h3>\n<p><strong>N\u1ebfu chi\u1ec1u d\u00e0i g\u1ea5p n l\u1ea7n chi\u1ec1u r\u1ed9ng, thi\u1ebft l\u1eadp ph\u01b0\u01a1ng tr\u00ecnh v\u1edbi \u1ea9n s\u1ed1.<\/strong><\/p>\n<div class=\"formula-box\"><b>V\u00ed d\u1ee5 4:<\/b>\u00a0Chu vi 60 cm, chi\u1ec1u d\u00e0i g\u1ea5p 2 l\u1ea7n chi\u1ec1u r\u1ed9ng.<br \/>\nG\u1ecdi chi\u1ec1u r\u1ed9ng l\u00e0 b, chi\u1ec1u d\u00e0i = 2b.<br \/>\n(2b + b) \u00d7 2 = 60 \u2192 3b \u00d7 2 = 60 \u2192 3b = 30 \u2192 b = 10 cm.<br \/>\nChi\u1ec1u d\u00e0i = 2 \u00d7 10 = 20 cm.<\/div>\n<div><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-299041 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-6\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-6-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/div>\n<h3>D\u1ea1ng 5: \u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h3>\n<p><strong>T\u00ednh v\u1eadt li\u1ec7u, h\u00e0ng r\u00e0o, ho\u1eb7c c\u00e1c y\u00eau c\u1ea7u th\u1ef1c t\u1ebf kh\u00e1c.<\/strong><\/p>\n<div class=\"formula-box\"><b>V\u00ed d\u1ee5 5:<\/b>\u00a0M\u1ed9t khu v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 25 m, chi\u1ec1u r\u1ed9ng 18 m. Mu\u1ed1n r\u00e0o 2 v\u00f2ng quanh v\u01b0\u1eddn c\u1ea7n bao nhi\u00eau m\u00e9t d\u00e2y?<br \/>\nChu vi 1 v\u00f2ng = (25 + 18) \u00d7 2 = 43 \u00d7 2 = 86 m.<br \/>\n2 v\u00f2ng: 86 \u00d7 2 = 172 m d\u00e2y.<\/div>\n<div class=\"section-expand\"><b>D\u1ea1ng b\u00e0i to\u00e1n n\u00e2ng cao:<\/b>\u00a0Y\u00eau c\u1ea7u t\u00ecm t\u1ed5ng chi\u1ec1u d\u00e0i t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh khi h\u00ecnh ch\u1eef nh\u1eadt gh\u00e9p t\u1eeb nhi\u1ec1u h\u00ecnh nh\u1ecf, ho\u1eb7c b\u00e0i to\u00e1n k\u1ebft h\u1ee3p c\u1ea3 di\u1ec7n t\u00edch v\u00e0 chu vi.<\/div>\n<\/section>\n<section id=\"ung-dung\">\n<h2>Chu vi h\u00ecnh ch\u1eef nh\u1eadt \u00e1p d\u1ee5ng trong th\u1ef1c t\u1ebf nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n<p><strong>Chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ed5ng chi\u1ec1u d\u00e0i v\u1eadt li\u1ec7u c\u1ea7n thi\u1ebft \u0111\u1ec3 bao quanh c\u00e1c khu v\u1ef1c h\u00ecnh ch\u1eef nh\u1eadt trong \u0111\u1eddi s\u1ed1ng v\u00e0 s\u1ea3n xu\u1ea5t.<\/strong><\/p>\n<ul>\n<li>T\u00ednh chi\u1ec1u d\u00e0i h\u00e0ng r\u00e0o, d\u00e2y th\u00e9p ho\u1eb7c v\u1eadt li\u1ec7u bao quanh khu \u0111\u1ea5t, m\u1ea3nh v\u01b0\u1eddn, b\u1ec3 b\u01a1i, s\u00e2n ch\u01a1i.<\/li>\n<li>T\u00ednh k\u00edch th\u01b0\u1edbc khung tranh, khung c\u1eeda, vi\u1ec1n t\u01b0\u1eddng, m\u00e1i nh\u00e0\u2026<\/li>\n<li>\u0110o chi\u1ec1u d\u00e0i v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i, d\u00e1n m\u00e9p, vi\u1ec1n th\u1ea3m, r\u00e8m c\u1eeda.<\/li>\n<li>Qu\u1ea3n l\u00fd v\u1eadt t\u01b0 trong x\u00e2y d\u1ef1ng, thi\u1ebft k\u1ebf n\u1ed9i th\u1ea5t ho\u1eb7c c\u00e1c ng\u00e0nh k\u1ef9 thu\u1eadt.<\/li>\n<li>\u1ee8ng d\u1ee5ng trong l\u1eadp k\u1ebf ho\u1ea1ch t\u00e0i ch\u00ednh cho c\u00e1c d\u1ef1 \u00e1n x\u00e2y d\u1ef1ng, trang tr\u00ed, c\u1ea3i t\u1ea1o.<\/li>\n<\/ul>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-299043 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-8\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-8-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<div class=\"section-expand\"><b>Ph\u00e2n t\u00edch chuy\u00ean s\u00e2u:<\/b>\u00a0Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng, gi\u00fap ph\u00e1t tri\u1ec3n t\u01b0 duy kh\u00f4ng gian, k\u1ef9 n\u0103ng \u01b0\u1edbc l\u01b0\u1ee3ng, t\u00ednh to\u00e1n v\u1eadt t\u01b0 v\u00e0 qu\u1ea3n l\u00fd chi ph\u00ed trong nhi\u1ec1u l\u0129nh v\u1ef1c.<\/div>\n<\/section>\n<section id=\"mo-rong-vuong\">\n<h2>C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh vu\u00f4ng v\u00e0 li\u00ean h\u1ec7 v\u1edbi h\u00ecnh ch\u1eef nh\u1eadt<\/h2>\n<p><strong>Chu vi h\u00ecnh vu\u00f4ng \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u1ea1nh nh\u00e2n 4, l\u00e0 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t c\u1ee7a chu vi h\u00ecnh ch\u1eef nh\u1eadt khi hai c\u1ea1nh b\u1eb1ng nhau.<\/strong><\/p>\n<div class=\"formula-box\"><b>C\u00f4ng th\u1ee9c:<\/b> P = a \u00d7 4<\/div>\n<div class=\"formula-box\"><b>a:<\/b>\u00a0\u0111\u1ed9 d\u00e0i m\u1ed9t c\u1ea1nh h\u00ecnh vu\u00f4ng.<\/div>\n<p>H\u00ecnh vu\u00f4ng l\u00e0 h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng b\u1eb1ng nhau. Do \u0111\u00f3, n\u1ebfu a = b, chu vi h\u00ecnh ch\u1eef nh\u1eadt tr\u1edf th\u00e0nh P = (a + a) \u00d7 2 = 2a \u00d7 2 = 4a (ch\u00ednh l\u00e0 chu vi h\u00ecnh vu\u00f4ng).<\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-299045 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-10\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-10-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<div class=\"section-expand\"><b>V\u00ed d\u1ee5:<\/b>\u00a0H\u00ecnh vu\u00f4ng c\u1ea1nh 7 cm c\u00f3 chu vi = 7 \u00d7 4 = 28 cm.<\/div>\n<\/section>\n<section id=\"faq\" class=\"faq-section\">\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt (FAQ)<\/h2>\n<h3>Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 g\u00ec?<\/h3>\n<p>Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 t\u1ed5ng chi\u1ec1u d\u00e0i c\u1ee7a b\u1ed1n c\u1ea1nh ngo\u00e0i, cho bi\u1ebft t\u1ed5ng chi\u1ec1u d\u00e0i \u0111\u01b0\u1eddng vi\u1ec1n bao quanh h\u00ecnh ch\u1eef nh\u1eadt. C\u00f4ng th\u1ee9c chung l\u00e0 P = (chi\u1ec1u d\u00e0i + chi\u1ec1u r\u1ed9ng) \u00d7 2.<\/p>\n<h3>C\u00e1ch t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt khi bi\u1ebft di\u1ec7n t\u00edch?<\/h3>\n<p>Khi ch\u1ec9 bi\u1ebft di\u1ec7n t\u00edch v\u00e0 m\u1ed9t c\u1ea1nh (v\u00ed d\u1ee5 chi\u1ec1u d\u00e0i ho\u1eb7c chi\u1ec1u r\u1ed9ng), b\u1ea1n c\u00f3 th\u1ec3 t\u00ecm c\u1ea1nh c\u00f2n l\u1ea1i b\u1eb1ng c\u00e1ch: c\u1ea1nh c\u00f2n l\u1ea1i = di\u1ec7n t\u00edch : c\u1ea1nh \u0111\u00e3 bi\u1ebft. Sau \u0111\u00f3 \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c chu vi: P = (a + b) \u00d7 2.<\/p>\n<h3>C\u00f4ng th\u1ee9c t\u00ednh n\u1eeda chu vi h\u00ecnh ch\u1eef nh\u1eadt?<\/h3>\n<p>N\u1eeda chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 t\u1ed5ng chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng: n\u1eeda chu vi = a + b. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc trung gian th\u01b0\u1eddng d\u00f9ng khi gi\u1ea3i b\u00e0i to\u00e1n ng\u01b0\u1ee3c ho\u1eb7c khi t\u00ecm m\u1ed9t c\u1ea1nh.<\/p>\n<p><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-299047 aligncenter webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12.jpg\" alt=\"cong-thuc-tinh-chu-vi-hinh-chu-nhat-12\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2023\/12\/chu-vi-hinh-chu-nhat-12-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<h3>T\u1ea1i sao c\u1ea7n ph\u00e2n bi\u1ec7t chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt?<\/h3>\n<p>B\u1edfi chu vi d\u00f9ng \u0111\u1ec3 t\u00ednh chi\u1ec1u d\u00e0i v\u1eadt li\u1ec7u bao quanh, c\u00f2n di\u1ec7n t\u00edch d\u00f9ng x\u00e1c \u0111\u1ecbnh ph\u1ea7n kh\u00f4ng gian b\u00ean trong. Nh\u1ea7m l\u1eabn hai \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0y c\u00f3 th\u1ec3 d\u1eabn t\u1edbi sai s\u00f3t l\u1edbn khi \u00e1p d\u1ee5ng th\u1ef1c t\u1ebf ho\u1eb7c gi\u1ea3i to\u00e1n.<\/p>\n<h3>\u0110\u01a1n v\u1ecb \u0111o chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 g\u00ec?<\/h3>\n<p>\u0110\u01a1n v\u1ecb \u0111o chu vi l\u00e0 c\u00e1c \u0111\u01a1n v\u1ecb chi\u1ec1u d\u00e0i nh\u01b0 cm, m, km, inch, foot,\u2026, kh\u00f4ng ph\u1ea3i \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch. Khi t\u00ednh to\u00e1n, c\u1ea7n ch\u00fa \u00fd th\u1ed1ng nh\u1ea5t \u0111\u01a1n v\u1ecb gi\u1eefa c\u00e1c c\u1ea1nh.<\/p>\n<\/section>\n<div class=\"\">\n<h2 style=\"text-align: justify;\">T\u1ea1m k\u1ebft<\/h2>\n<p style=\"text-align: justify;\">Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 c\u00f4ng c\u1ee5 t\u00ednh to\u00e1n, c\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt m\u00e0 Ho\u00e0ng H\u00e0 Mobile \u0111\u00e3 t\u1ed5ng h\u1ee3p trong n\u1ed9i dung b\u00e0i vi\u1ebft tr\u00ean c\u00f2n mang \u0111\u1ebfn nhi\u1ec1u \u1ee9ng d\u1ee5ng quan tr\u1ecdng. V\u1edbi c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n n\u00e0y, ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u01b0\u1edbc l\u01b0\u1ee3ng l\u01b0\u1ee3ng v\u1eadt li\u1ec7u c\u1ea7n thi\u1ebft trong vi\u1ec7c \u0111\u00f3ng g\u00f3i s\u1ea3n ph\u1ea9m, l\u1eadp k\u1ebf ho\u1ea1ch x\u00e2y d\u1ef1ng, qu\u1ea3n l\u00fd \u0111\u1ea5t \u0111ai hay thi\u1ebft k\u1ebf kh\u00f4ng gian s\u1ed1ng.<\/p>\n<p style=\"text-align: justify;\">XEM TH\u00caM:<\/p>\n<ul>\n<li style=\"text-align: justify;\"><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/duong-trung-tuyen-la-gi\/\">\u0110\u01b0\u1eddng trung tuy\u1ebfn l\u00e0 g\u00ec? T\u00ednh ch\u1ea5t, c\u00f4ng th\u1ee9c v\u00e0 b\u00e0i t\u1eadp t\u00ednh \u0111\u01b0\u1eddng trung tuy\u1ebfn<\/a><\/strong><\/li>\n<li style=\"text-align: justify;\"><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cong-thuc-luong-giac\/\">C\u00f4ng th\u1ee9c l\u01b0\u1ee3ng gi\u00e1c, b\u1ea3ng c\u00f4ng th\u1ee9c l\u01b0\u1ee3ng gi\u00e1c \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t<\/a><\/strong><\/li>\n<\/ul>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>B\u00e0i vi\u1ebft n\u00e0y h\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00e1ch t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt, bao g\u1ed3m \u0111\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t, ph\u00e2n bi\u1ec7t v\u1edbi di\u1ec7n t\u00edch, h\u1ec7 th\u1ed1ng b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n t\u1edbi n\u00e2ng cao c\u00f3 \u0111\u00e1p \u00e1n, c\u00f4ng c\u1ee5 t\u00ednh online, \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n v\u00e0 gi\u1ea3i th\u00edch chuy\u00ean s\u00e2u gi\u00fap b\u1ea1n [&hellip;]<\/p>\n","protected":false},"author":75,"featured_media":299048,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-297765","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 v24.2 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u00e1ch t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt L\u1edbp 3, 4, 5 | C\u00f4ng th\u1ee9c<\/title>\n<meta name=\"description\" content=\"H\u01b0\u1edbng d\u1eabn chi ti\u1ebft c\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt, n\u1eeda chu vi v\u00e0 c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao.\" \/>\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\/chu-vi-hinh-chu-nhat\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt &amp; 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