{"id":17871,"date":"2025-07-05T17:30:26","date_gmt":"2025-07-05T10:30:26","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=17871"},"modified":"2025-07-05T17:30:26","modified_gmt":"2025-07-05T10:30:26","slug":"cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/","title":{"rendered":"C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Cong_thuc_tinh_chu_vi_hinh_chu_nhat\" >C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Vi_sao_can_tinh_chu_vi_hinh_chu_nhat\" >V\u00ec sao c\u1ea7n t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Cac_dang_toan_tinh_chu_vi_hcn_tieu_hoc_thuong_gap\" >C\u00e1c d\u1ea1ng to\u00e1n t\u00ednh chu vi hcn ti\u1ec3u h\u1ecdc th\u01b0\u1eddng g\u1eb7p<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Dang_1_Tinh_chu_vi_hinh_chu_nhat_khi_biet_chieu_dai_chieu_rong\" >D\u1ea1ng 1: T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt khi bi\u1ebft chi\u1ec1u d\u00e0i, chi\u1ec1u r\u1ed9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Dang_2_Tinh_chieu_dai_hoac_rong_cua_hinh_chu_nhat_khi_biet_chu_vi_chieu_dai_1_canh\" >D\u1ea1ng 2: T\u00ednh chi\u1ec1u d\u00e0i ho\u1eb7c r\u1ed9ng c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt khi bi\u1ebft chu vi, chi\u1ec1u d\u00e0i 1 c\u1ea1nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Dang_3_Tinh_nua_chu_vi_hinh_chu_nhat\" >D\u1ea1ng 3: T\u00ednh n\u1eeda chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Bai_tap_toan_lien_quan_toi_chu_vi_hinh_chu_nhat_de_be_luyen_tap\" >B\u00e0i t\u1eadp to\u00e1n li\u00ean quan t\u1edbi chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ec3 b\u00e9 luy\u1ec7n t\u1eadp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Bi_quyet_giup_be_hoc_ghi_nho_kien_thuc_chu_vi_hinh_chu_nhat_hieu_qua\" >B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc, ghi nh\u1edb ki\u1ebfn th\u1ee9c chu vi h\u00ecnh ch\u1eef nh\u1eadt hi\u1ec7u qu\u1ea3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Xay_dung_nen_tang_toan_hoc_vung_chac_cho_tre_voi_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\" >X\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc v\u1eefng ch\u1eafc cho tr\u1ebb v\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Nam_vung_kien_thuc_co_ban_ve_hinh_chu_nhat_va_cong_thuc_tinh_chu_vi_rat_can_thiet\" >N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh chu vi r\u1ea5t c\u1ea7n thi\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Cung_be_luyen_tap_thuc_hanh_nhieu_hon\" >C\u00f9ng b\u00e9 luy\u1ec7n t\u1eadp, th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Mot_so_luu_y_khi_tinh_chu_vi_hinh_chu_nhat\" >M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tinh-chu-vi-hinh-chu-nhat-nhu-the-nao\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>C\u00e1ch t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt\u00a0l\u00e0 d\u1ea1ng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 h\u00ecnh h\u1ecdc m\u00e0 c\u00e1c b\u00e9 c\u1ea5p 1 s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen, h\u1ecdc, th\u1ef1c h\u00e0nh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ea3 trong th\u1ef1c t\u1ebf. \u0110\u1ec3 gi\u00fap c\u00e1c b\u00e9 h\u1ecdc t\u1ed1t ki\u1ebfn th\u1ee9c n\u00e0y, h\u00e3y c\u00f9ng tham kh\u1ea3o chi ti\u1ebft trong b\u00e0i vi\u1ebft n\u00e0y c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef nh\u00e9.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a m\u00ecnh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc cho con.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i h\u1ecd t\u00ean<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i S\u0110T<\/p>\n<p>                                                                                Th\u00e0nh th\u1ea1o 2.000+ t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng anh<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng anh<br \/>\n                                                                                Gi\u1ecfi To\u00e1n &#8211; ti\u1ebfng Anh theo ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n EQ &amp; kh\u1ea3 n\u0103ng ti\u1ebfng Vi\u1ec7t<\/p>\n<p>                                                                                *B\u1ea1n ch\u01b0a ch\u1ecdn m\u1ee5c n\u00e0o!<\/p>\n<p>                                                                    \u0110\u0103ng K\u00fd T\u01b0 V\u1ea5n Mi\u1ec5n Ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_chu_vi_hinh_chu_nhat\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Chu vi\u00a0h\u00ecnh ch\u1eef nh\u1eadt\u00a0\u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0\u00a0t\u1ed5ng \u0111\u1ed9 d\u00e0i c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh v\u1edbi nhau. \u0110\u00e2y c\u0169ng l\u00e0 \u0111i\u1ec3m chung c\u1ee7a c\u00f4ng th\u1ee9c t\u00ednh chu vi c\u00e1c\u00a0h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t. Tuy nhi\u00ean, \u0111\u1ec3 thu\u1eadn ti\u1ec7n h\u01a1n khi ghi nh\u1edb c\u00f4ng th\u1ee9c v\u00e0 t\u00ednh to\u00e1n gi\u1eefa c\u00e1c h\u00ecnh t\u1ee9 gi\u00e1c kh\u00e1c nhau, n\u00ean m\u1ed7i h\u00ecnh s\u1ebd c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh ri\u00eang.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chu-vi-hinh-chu-nhat-1.jpg\" alt=\"C\u00f4ng th\u1ee9c t\u00ednh chu vi c\u1ee7a m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3, v\u1edbi\u00a0quy t\u1eafc t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt s\u1ebd l\u1ea5y chi\u1ec1u d\u00e0i c\u1ed9ng v\u1edbi chi\u1ec1u r\u1ed9ng v\u00e0 nh\u00e2n v\u1edbi 2.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c c\u1ee5 th\u1ec3:\u00a0P = (a + b) x 2<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">P\u00a0l\u00e0 chu vi h\u00ecnh ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a\u00a0l\u00e0 chi\u1ec1u d\u00e0i h\u00ecnh ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">b\u00a0l\u00e0 chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5:\u00a0Cho h\u00ecnh ch\u1eef nh\u1eadt ABCD, bi\u1ebft chi\u1ec1u d\u00e0i h\u00ecnh l\u00e0 7cm, chi\u1ec1u r\u1ed9ng 3cm. Y\u00eau c\u1ea7u t\u00ecnh chu vi h\u00ecnh ch\u1eef nh\u1eadt ABCD.<\/em><\/p>\n<p dir=\"ltr\"><em>Chu vi h\u00ecnh ch\u1eef nh\u1eadt ABCD l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>(7 + 3) x 2 = 20 cm<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 20 cm<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Vi_sao_can_tinh_chu_vi_hinh_chu_nhat\"><\/span>V\u00ec sao c\u1ea7n t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Tr\u00ean th\u1ef1c t\u1ebf, c\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp trong to\u00e1n h\u1ecdc. B\u00ean c\u1ea1nh \u0111\u00f3, n\u00f3 c\u0169ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n trong th\u1ef1c t\u1ebf trong vi\u1ec7c \u0111o \u0111\u1ea1c \u0111\u1ea5t \u0111ai, x\u00e2y d\u1ef1ng, thi\u1ebft k\u1ebf,\u2026<\/p>\n<p dir=\"ltr\">Qua \u0111\u00f3 c\u00f3 th\u1ec3 th\u1ea5y \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng c\u1ee7a vi\u1ec7c t\u00ednh chu vi hcn c\u1ef1c k\u1ef3 quan tr\u1ecdng. V\u1eady n\u00ean, vi\u1ec7c n\u1eafm \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft kh\u00f4ng ch\u1ec9 trong vi\u1ec7c h\u1ecdc t\u1eadp m\u00e0 c\u00f2n t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn \u0111\u1eddi s\u1ed1ng th\u1ef1c t\u1ebf.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chu-vi-hinh-chu-nhat-2.jpg\" alt=\"Vi\u1ec7c t\u00ednh chu vi hcn \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng trong nhi\u1ec1u l\u0129nh v\u1ef1c. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_toan_tinh_chu_vi_hcn_tieu_hoc_thuong_gap\"><\/span>C\u00e1c d\u1ea1ng to\u00e1n t\u00ednh chu vi hcn ti\u1ec3u h\u1ecdc th\u01b0\u1eddng g\u1eb7p<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Th\u1ef1c ch\u1ea5t, v\u1edbi c\u00e1c b\u00e9 h\u1ecdc c\u1ea5p ti\u1ec3u h\u1ecdc th\u00ec to\u00e1n v\u1ec1 t\u00ednh chu vi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt m\u1edbi \u1edf m\u1ee9c c\u01a1 b\u1ea3n, ch\u01b0a c\u00f3 qu\u00e1 nhi\u1ec1u ki\u1ebfn th\u1ee9c ph\u1ee9c t\u1ea1p. V\u1edbi c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp b\u00e9 s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc v\u00e0 l\u00e0m quen nh\u01b0 sau:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chu-vi-hinh-chu-nhat-3.jpg\" alt=\"C\u00f3 nhi\u1ec1u d\u1ea1ng b\u00e0i t\u1eadp to\u00e1n li\u00ean quan t\u1edbi vi\u1ec7c t\u00ednh chu vi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Tinh_chu_vi_hinh_chu_nhat_khi_biet_chieu_dai_chieu_rong\"><\/span>D\u1ea1ng 1: T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt khi bi\u1ebft chi\u1ec1u d\u00e0i, chi\u1ec1u r\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 d\u1ea1ng to\u00e1n c\u01a1 b\u1ea3n nh\u1ea5t, khi \u0111\u1ec1 b\u00e0i s\u1ebd cho bi\u1ebft ch\u00ednh x\u00e1c chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng c\u1ee7a h\u00ecnh, y\u00eau c\u1ea7u h\u1ecdc sinh t\u00ednh chu vi ch\u00ednh x\u00e1c. V\u1eady n\u00ean, c\u00e1c em ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng \u0111\u00fang ch\u00ednh x\u00e1c c\u00f4ng th\u1ee9c t\u00ednh chu vi c\u1ee7a h\u00ecnh l\u00e0 P = (a + b) x 2 \u0111\u1ec3 th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5:\u00a0Cho h\u00ecnh ch\u1eef nh\u1eadt ABCD, bi\u1ebft chi\u1ec1u d\u00e0i l\u00e0 5cm, chi\u1ec1u r\u1ed9ng 3cm. T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt ABCD?<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Chu vi h\u00ecnh ch\u1eef nh\u1eadt ABCD l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>P = (5 + 3) x 2 = 16 (cm)<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u00e1p s\u1ed1: 16cm.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Tinh_chieu_dai_hoac_rong_cua_hinh_chu_nhat_khi_biet_chu_vi_chieu_dai_1_canh\"><\/span>D\u1ea1ng 2: T\u00ednh chi\u1ec1u d\u00e0i ho\u1eb7c r\u1ed9ng c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt khi bi\u1ebft chu vi, chi\u1ec1u d\u00e0i 1 c\u1ea1nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y s\u1ebd ng\u01b0\u1ee3c l\u1ea1i v\u1edbi d\u1ea1ng 1 tr\u00ean, khi \u0111\u1ec1 b\u00e0i s\u1ebd cho bi\u1ebft chu vi c\u1ee7a h\u00ecnh v\u00e0 s\u1ebd y\u00eau c\u1ea7u h\u1ecdc sinh t\u00ednh chi\u1ec1u d\u00e0i ho\u1eb7c chi\u1ec1u r\u1ed9ng c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt t\u01b0\u01a1ng \u1ee9ng. V\u1eady n\u00ean, c\u0169ng t\u1eeb c\u00f4ng th\u1ee9c t\u00ednh chu vi P = (a+b) x 2 =&gt; b= P\/2 \u2013 a ho\u1eb7c a = P\/2 \u2013 b<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5:\u00a0Nh\u00e0 b\u1ea1n Nga d\u1ef1 \u0111\u1ecbnh s\u1ebd x\u00e2y m\u1ed9t c\u00e1i s\u00e2n nh\u1ecf h\u00ecnh ch\u1eef nh\u1eadt tr\u01b0\u1edbc nh\u00e0 \u0111\u1ec3 2 ch\u1ecb em Nga c\u00f3 th\u1ec3 tho\u1ea3i m\u00e1i vui ch\u01a1i m\u1ed7i chi\u1ec1u. B\u1ed1 Nga nh\u1edd Nga t\u00ednh gi\u00fap chi\u1ec1u d\u00e0i c\u1ee7a s\u00e2n v\u00e0 cho Nga bi\u1ebft s\u00e2n c\u00f3 chu vi l\u00e0 30m, chi\u1ec1u r\u1ed9ng l\u00e0 5m. H\u1ecfi chi\u1ec1u d\u00e0i c\u1ee7a s\u00e2n nh\u00e0 Nga l\u00e0 bao nhi\u00eau m\u00e9t?<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i:\u00a0<\/em><\/p>\n<p dir=\"ltr\"><em>\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c ph\u00eda tr\u00ean ta c\u00f3 chi\u1ec1u d\u00e0i s\u00e2n nh\u00e0 Nga l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>b = P\/2 -a = 30\/2 &#8211; 5 = 10m<\/em><\/p>\n<p dir=\"ltr\"><em>V\u1eady chi\u1ec1u d\u00e0i s\u00e2n nh\u00e0 Nga s\u1ebd x\u00e2y l\u00e0 10m<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Tinh_nua_chu_vi_hinh_chu_nhat\"><\/span>D\u1ea1ng 3: T\u00ednh n\u1eeda chu vi h\u00ecnh ch\u1eef nh\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y s\u1ebd y\u00eau c\u1ea7u t\u00ednh n\u1eeda chu vi c\u1ee7a m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt cho tr\u01b0\u1edbc. N\u00ean c\u00f4ng th\u1ee9c s\u1ebd b\u1eb1ng P\/2 ho\u1eb7c b\u1eb1ng a + b.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5:\u00a0M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 28cm, chi\u1ec1u r\u1ed9ng b\u1eb1ng 20 cm. H\u1ecfi m\u1ed9t n\u1eeda m\u1ea3nh v\u01b0\u1eddn c\u00f3 chu vi b\u1eb1ng bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>\u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh n\u1eeda chu vi h\u00ecnh ch\u1eef nh\u1eadt ta \u0111\u01b0\u1ee3c a + b = 28 + 20 = 48cm.<\/em><\/p>\n<p dir=\"ltr\"><em>=&gt; N\u1eeda m\u1ea3nh v\u01b0\u1eddn c\u00f3 chu vi l\u00e0 48cm.<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_toan_lien_quan_toi_chu_vi_hinh_chu_nhat_de_be_luyen_tap\"><\/span>B\u00e0i t\u1eadp to\u00e1n li\u00ean quan t\u1edbi chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u1ec3 b\u00e9 luy\u1ec7n t\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 t\u00ednh to\u00e1n chu vi c\u1ee7a m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt t\u01b0\u01a1ng \u1ee9ng \u0111\u1ec3 c\u00e1c b\u00e9 c\u00f3 th\u1ec3 c\u00f9ng nhau luy\u1ec7n t\u1eadp d\u1ec5 d\u00e0ng:<\/p>\n<p dir=\"ltr\">B\u00e0i 1: M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 28cm, chi\u1ec1u r\u1ed9ng b\u1eb1ng 1\/4 chi\u1ec1u d\u00e0i. H\u00e3y t\u00ednh chu vi m\u1ea3nh v\u01b0\u1eddn.<\/p>\n<p dir=\"ltr\">B\u00e0i 2: M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 20 cm v\u00e0 chu vi b\u1eb1ng 100cm. H\u00e3y t\u00ednh chi\u1ec1u r\u1ed9ng c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt.<\/p>\n<p dir=\"ltr\">B\u00e0i 3: T\u00ednh chu vi v\u00e0 di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt bi\u1ebft chi\u1ec1u r\u1ed9ng b\u1eb1ng 15cm v\u00e0 n\u1eeda chu vi b\u1eb1ng 40cm?<\/p>\n<p dir=\"ltr\">B\u00e0i 4: Chu vi h\u00ecnh ch\u1eef nh\u1eadt b\u1eb1ng chu vi h\u00ecnh vu\u00f4ng c\u1ea1nh 50m. Chi\u1ec1u d\u00e0i b\u1eb1ng 70m. T\u00ednh chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt.<\/p>\n<p dir=\"ltr\">B\u00e0i 5: H\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 45m, chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt b\u1eb1ng c\u1ea1nh h\u00ecnh vu\u00f4ng c\u00f3 chu vi 100m. T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3 ?<\/p>\n<p dir=\"ltr\">B\u00e0i 6: M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi b\u1eb1ng chu vi h\u00ecnh vu\u00f4ng c\u1ea1nh 9cm. Bi\u1ebft chi\u1ec1u d\u00e0i h\u00ecnh ch\u1eef nh\u1eadt b\u1eb1ng 10cm. Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 bao nhi\u00eau ?<\/p>\n<p dir=\"ltr\">B\u00e0i 7:\u00a0M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 5dm8cm, chi\u1ec1u d\u00e0i g\u1ea5p 4 l\u1ea7n chi\u1ec1u r\u1ed9ng. Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 bao nhi\u00eau ?<\/p>\n<p dir=\"ltr\">B\u00e0i 8:\u00a0M\u1ed9t t\u1edd gi\u1ea5y m\u00e0u h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u r\u1ed9ng b\u1eb1ng chi\u1ec1u d\u00e0i. T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3 bi\u1ebft di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt b\u1eb1ng.<\/p>\n<p dir=\"ltr\">B\u00e0i 9:\u00a0M\u1ed9t b\u0103ng gi\u1ea5y h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u r\u1ed9ng 8cm. N\u1ebfu t\u0103ng chi\u1ec1u r\u1ed9ng l\u00ean 3cm th\u00ec di\u1ec7n t\u00edch b\u0103ng gi\u1ea5y t\u0103ng th\u00eam. T\u00ednh di\u1ec7n t\u00edch th\u1ef1c c\u1ee7a b\u0103ng gi\u1ea5y.<\/p>\n<p dir=\"ltr\">B\u00e0i 10: N\u1ebfu gi\u1ea3m chi\u1ec1u d\u00e0i c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt 5cm th\u00ec \u0111\u01b0\u1ee3c m\u1ed9t h\u00ecnh vu\u00f4ng c\u00f3 chu vi b\u1eb1ng 36cm2. T\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt.<\/p>\n<p dir=\"ltr\">B\u00e0i 11:\u00a0H\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 45m, chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt b\u1eb1ng c\u1ea1nh h\u00ecnh vu\u00f4ng c\u00f3 chu vi 100m. Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">B\u00e0i 12:\u00a0M\u1ed9t h\u00ecnh vu\u00f4ng c\u00f3 c\u1ea1nh b\u1eb1ng chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt. Bi\u1ebft h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi b\u1eb1ng 56cm, chi\u1ec1u d\u00e0i b\u1eb1ng 20cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng.<\/p>\n<p dir=\"ltr\">B\u00e0i 13:\u00a0Bi\u1ebft chu vi m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt g\u1ea5p 6 l\u1ea7n chi\u1ec1u r\u1ed9ng. H\u1ecfi chi\u1ec1u d\u00e0i h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3 g\u1ea5p m\u1ea5y l\u1ea7n chi\u1ec1u r\u1ed9ng?<\/p>\n<p dir=\"ltr\">B\u00e0i 14:\u00a0M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 m\u1ed9t h\u00ecnh vu\u00f4ng c\u00f3 chu vi b\u1eb1ng nhau v\u00e0 b\u1eb1ng 36cm. Chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt b\u1eb1ng 1\/2 chi\u1ec1u d\u00e0i. H\u1ecfi di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng h\u01a1n di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt bao nhi\u00eau x\u0103ng-ti-m\u00e9t vu\u00f4ng?<\/p>\n<p dir=\"ltr\">B\u00e0i 15:\u00a0M\u1ed9t t\u1ea5m b\u00eca h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 hai l\u1ea7n chi\u1ec1u r\u1ed9ng k\u00e9m chi\u1ec1u d\u00e0i 6cm, nh\u01b0ng chi\u1ec1u d\u00e0i l\u1ea1i k\u00e9m n\u0103m l\u1ea7n chi\u1ec1u r\u1ed9ng l\u00e0 3cm. T\u00ednh di\u1ec7n t\u00edch t\u1ea5m b\u00eca h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 16:\u00a0M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi 72cm. N\u1ebfu gi\u1ea3m chi\u1ec1u r\u1ed9ng \u0111i 6cm v\u00e0 gi\u1eef nguy\u00ean chi\u1ec1u d\u00e0i th\u00ec di\u1ec7n t\u00edch gi\u1ea3m \u0111i 120cm2. T\u00ednh chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3.<\/p>\n<p dir=\"ltr\">B\u00e0i 17:\u00a0M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi g\u1ea5p \u0111\u00f4i chu vi h\u00ecnh vu\u00f4ng c\u1ea1nh 415m. T\u00ednh chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3. Bi\u1ebft chi\u1ec1u d\u00e0i g\u1ea5p 4 l\u1ea7n chi\u1ec1u r\u1ed9ng.<\/p>\n<p dir=\"ltr\">B\u00e0i 18:\u00a0M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i g\u1ea5p \u0111\u00f4i chi\u1ec1u r\u1ed9ng. T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt \u0111\u00f3, bi\u1ebft di\u1ec7n t\u00edch c\u1ee7a n\u00f3 l\u00e0 32cm2.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_giup_be_hoc_ghi_nho_kien_thuc_chu_vi_hinh_chu_nhat_hieu_qua\"><\/span>B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc, ghi nh\u1edb ki\u1ebfn th\u1ee9c chu vi h\u00ecnh ch\u1eef nh\u1eadt hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">V\u1edbi c\u00e1c b\u00e9 h\u1ecdc c\u1ea5p 1, \u0111\u00e2y l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n ch\u01b0a c\u00f3 nhi\u1ec1u ph\u1ea7n ph\u1ee9c t\u1ea1p, qu\u00e1 kh\u00f3. Nh\u01b0ng \u0111\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 h\u1ecdc t\u1eadp v\u00e0 \u00e1p d\u1ee5ng trong vi\u1ec7c gi\u1ea3i to\u00e1n v\u00e0 th\u1ef1c t\u1ebf, b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng ngay nh\u1eefng b\u00ed quy\u1ebft sau:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Xay_dung_nen_tang_toan_hoc_vung_chac_cho_tre_voi_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\"><\/span>X\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc v\u1eefng ch\u1eafc cho tr\u1ebb v\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">S\u1ebd th\u1eadt sai l\u1ea7m khi b\u1ed1 m\u1eb9 kh\u00f4ng c\u00f3 ph\u01b0\u01a1ng ph\u00e1p hay n\u1ec1n t\u1ea3ng v\u1ec1 to\u00e1n h\u1ecdc \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn b\u00e9 h\u1ecdc to\u00e1n m\u1ed9t c\u00e1ch h\u1ee9ng th\u00fa v\u00e0 hi\u1ec7u qu\u1ea3. B\u1edfi v\u00ec m\u00f4n to\u00e1n l\u00e0 m\u00f4n h\u1ecdc kh\u00e1 \u0111\u1eb7c th\u00f9, nh\u1ea5t l\u00e0 to\u00e1n h\u00ecnh n\u1ebfu kh\u00f4ng d\u1ea1y \u0111\u00fang ph\u01b0\u01a1ng ph\u00e1p th\u00ec b\u00e9 r\u1ea5t nhanh d\u1ec5 ch\u00e1n v\u00e0 kh\u00f4ng c\u00f3 h\u1ee9ng th\u00fa h\u1ecdc t\u1eadp.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chu-vi-hinh-chu-nhat-4.jpg\" alt=\"Trang b\u1ecb ki\u1ebfn th\u1ee9c to\u00e1n h\u1ecdc b\u00e0i b\u1ea3n cho b\u00e9 v\u1edbi Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math. (\u1ea3nh: Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">V\u1eady n\u00ean, \u0111\u1ec3 gi\u00fap b\u1ed1 m\u1eb9 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c n\u1ed7i lo n\u00e0y,\u00a0Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math\u00a0\u0111\u00e3 ra \u0111\u1eddi khi mang t\u1edbi nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y b\u00e9 h\u1ecdc to\u00e1n kh\u00e1c nhau \u0111\u1ec3 n\u00e2ng cao s\u1ef1 h\u1ee9ng th\u00fa v\u00e0 hi\u1ec7u qu\u1ea3 cho b\u00e9.<\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math l\u00e0 \u1ee9ng d\u1ee5ng h\u1ecdc to\u00e1n ti\u1ebfng Anh \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi \u0111\u1ed9i ng\u0169 chuy\u00ean gia Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef, v\u1edbi n\u1ed9i dung d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n to\u00e1n ti\u1ebfng Anh t\u01b0 duy chu\u1ea9n M\u1ef9, nh\u01b0ng v\u1eabn \u0111\u1ea3m b\u1ea3o b\u00e1m s\u00e1t ch\u01b0\u01a1ng tr\u00ecnh GDPT m\u1edbi nh\u1ea5t, \u0111\u1ec3 gi\u00fap k\u1ebft qu\u1ea3 h\u1ecdc t\u1eadp c\u1ee7a b\u00e9 \u0111\u00e1p \u1ee9ng chu\u1ea9n \u0111\u1ea7u ra c\u1ee7a B\u1ed9 GD\u0110T n\u01b0\u1edbc ta.<\/p>\n<p dir=\"ltr\">V\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd \u0111\u01b0\u1ee3c chia ra th\u00e0nh nhi\u1ec1u c\u1ea5p \u0111\u1ed9 h\u1ecdc to\u00e1n kh\u00e1c nhau d\u1ef1a tr\u00ean \u0111\u1ed9 tu\u1ed5i c\u1ee7a t\u1eebng b\u00e9, bao g\u1ed3m:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea5p \u0111\u1ed9 h\u1ecdc 1 (Pre-K):\u00a0cho b\u00e9 t\u1eeb 3-5 tu\u1ed5i v\u1edbi 50+ b\u00e0i h\u1ecdc. M\u1ed7i b\u00e0i h\u1ecdc k\u00e9o d\u00e0i 10-20 ph\u00fat\/b\u00e0i.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea5p \u0111\u1ed9 h\u1ecdc 2 (Kindergarten):\u00a0cho b\u00e9 t\u1eeb 4-6 tu\u1ed5i v\u1edbi 100+ b\u00e0i h\u1ecdc. M\u1ed7i b\u00e0i h\u1ecdc k\u00e9o d\u00e0i 15-30 ph\u00fat\/b\u00e0i.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea5p \u0111\u1ed9 h\u1ecdc 3 (Grade 1):\u00a0cho b\u00e9 t\u1eeb 5-7 tu\u1ed5i v\u1edbi 150+ b\u00e0i h\u1ecdc, m\u1ed7i b\u00e0i h\u1ecdc k\u00e9o d\u00e0i 15 \u2013 30 ph\u00fat\/b\u00e0i.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Th\u1eddi l\u01b0\u1ee3ng m\u1ed7i b\u00e0i h\u1ecdc \u1edf c\u00e1c c\u1ea5p s\u1ebd kh\u00e1c nhau, d\u1ef1a v\u00e0o n\u0103ng l\u1ef1c h\u1ecdc t\u1eadp c\u1ee7a m\u1ed7i b\u00e9 \u0111\u1ec3 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh h\u1ee3p l\u00fd.<\/p>\n<p dir=\"ltr\">\u0110\u1eb7c bi\u1ec7t, khi h\u1ecdc to\u00e1n c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd s\u1eed d\u1ee5ng ho\u00e0n to\u00e0n b\u1eb1ng ti\u1ebfng Anh. N\u00ean b\u1ed1 m\u1eb9 v\u1eeba gi\u00fap con ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c v\u1edbi to\u00e1n, v\u1eeba h\u1ecdc ngo\u1ea1i ng\u1eef m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean. V\u1edbi nh\u1eefng b\u00e9 ch\u01b0a bi\u1ebft ti\u1ebfng Anh trong giai \u0111o\u1ea1n \u0111\u1ea7u s\u1ebd h\u01a1i kh\u00f3 kh\u0103n, nh\u01b0ng v\u1edbi h\u00ecnh \u1ea3nh minh h\u1ecda r\u00f5 r\u00e0ng, c\u00f3 video h\u01b0\u1edbng d\u1eabn h\u1ecdc chi ti\u1ebft n\u00ean sau m\u1ed9t th\u1eddi gian ki\u00ean tr\u00ec, con kh\u00f4ng ch\u1ec9 h\u1ecdc to\u00e1n t\u1ed1t m\u00e0 c\u00f2n gia t\u0103ng kh\u1ea3 n\u0103ng h\u1ecdc ti\u1ebfng Anh t\u1ed1t h\u01a1n.<\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i Android<\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i iOS<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nam_vung_kien_thuc_co_ban_ve_hinh_chu_nhat_va_cong_thuc_tinh_chu_vi_rat_can_thiet\"><\/span>N\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 h\u00ecnh ch\u1eef nh\u1eadt v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh chu vi r\u1ea5t c\u1ea7n thi\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 gi\u1ea3i \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i t\u1eadp to\u00e1n m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t, \u0111\u00f2i h\u1ecfi c\u00e1c b\u00e9 ph\u1ea3i n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n, l\u00fd thuy\u1ebft v\u1ec1 h\u00ecnh v\u00e0 c\u00f4ng th\u1ee9c t\u00ednh m\u1ed9t c\u00e1ch chu\u1ea9n nh\u1ea5t. B\u1edfi trong to\u00e1n h\u1ecdc, n\u1ebfu \u201csai m\u1ed9t ly l\u00e0 \u0111i m\u1ed9t d\u1eb7m\u201d, ch\u1ec9 c\u1ea7n c\u00f4ng th\u1ee9c sai th\u00ec k\u1ebft qu\u1ea3 t\u00ednh c\u0169ng s\u1ebd sai.<\/p>\n<p dir=\"ltr\">V\u1eady n\u00ean, b\u1ed1 n\u00ean th\u01b0\u1eddng xuy\u00ean ki\u1ec3m tra l\u00fd thuy\u1ebft c\u1ee7a b\u00e9, \u0111\u1eb7t c\u00e1c c\u00e2u h\u1ecfi li\u00ean quan nh\u01b0 \u201cc\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 g\u00ec?\u201d, \u201cn\u1ebfu b\u00e0i to\u00e1n cho chu vi, l\u00e0m sao t\u00ecm \u0111\u01b0\u1ee3c chi\u1ec1u d\u00e0i h\u00ecnh ch\u1eef nh\u1eadt?\u201d\u2026 \u0110\u1ec3 qua \u0111\u00f3 bi\u1ebft \u0111\u01b0\u1ee3c b\u00e9 y\u1ebfu ki\u1ebfn th\u1ee9c n\u00e0o \u0111\u1ec3 c\u1ee7ng c\u1ed1 k\u1ecbp th\u1eddi.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cung_be_luyen_tap_thuc_hanh_nhieu_hon\"><\/span>C\u00f9ng b\u00e9 luy\u1ec7n t\u1eadp, th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi \u0111\u00e3 c\u00f3 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 h\u00ecnh ch\u1eef nh\u1eadt, \u0111\u00e3 \u0111\u1ebfn l\u00fac b\u1ed1 m\u1eb9 n\u00ean t\u1ea1o c\u01a1 h\u1ed9i \u0111\u1ec3 b\u00e9 \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh, luy\u1ec7n t\u1eadp nhi\u1ec1u h\u01a1n.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/chu-vi-hinh-chu-nhat-5.jpg\" alt=\"Vi\u1ec7c luy\u1ec7n t\u1eadp th\u01b0\u1eddng xuy\u00ean r\u1ea5t quan tr\u1ecdng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Vi\u1ec7c th\u1ef1c h\u00e0nh \u1edf \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 c\u00f9ng b\u00e9 l\u00e0m b\u00e0i t\u1eadp th\u01b0\u1eddng xuy\u00ean, t\u00ecm ki\u1ebfm th\u00eam nhi\u1ec1u ki\u1ebfn th\u1ee9c m\u1edbi n\u00e2ng cao li\u00ean quan t\u1edbi t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt, t\u1ed5 ch\u1ee9c c\u00e1c cu\u1ed9c thi t\u1ea1i nh\u00e0 c\u00f9ng b\u1ea1n b\u00e8, gi\u1ea3i c\u00e2u \u0111\u1ed1, t\u1ed5 ch\u1ee9c c\u00e1c tr\u00f2 ch\u01a1i,\u2026<\/p>\n<p dir=\"ltr\">Khi \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean, b\u00e9 s\u1ebd d\u1ec5 d\u00e0ng ghi nh\u1edb ki\u1ebfn th\u1ee9c, c\u0169ng nh\u01b0 bi\u1ebft c\u00e1ch \u00e1p d\u1ee5ng l\u00fd thuy\u1ebft \u0111i v\u00e0o th\u1ef1c t\u1ebf m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, tr\u00e1nh t\u00ecnh tr\u1ea1ng h\u1ecdc v\u1eb9t hay \u201ch\u1ecdc tr\u01b0\u1edbc qu\u00ean sau\u201d.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_luu_y_khi_tinh_chu_vi_hinh_chu_nhat\"><\/span>M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong qu\u00e1 tr\u00ecnh h\u1ecdc ki\u1ebfn th\u1ee9c v\u1ec1 t\u00ednh chu vi c\u1ee7a m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt, c\u00e1c em c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00e3y \u0111\u1ea3m b\u1ea3o c\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt c\u00f9ng \u0111\u01a1n v\u1ecb \u0111o:\u00a0N\u1ebfu \u0111\u1ec1 b\u00e0i cho c\u00e1c \u0111\u01a1n v\u1ecb c\u1ee7a c\u00e1c d\u1eef ki\u1ec7n kh\u00e1c nhau th\u00ec ph\u1ea3i quy \u0111\u1ed5i v\u1ec1 c\u00f9ng \u0111\u01a1n v\u1ecb m\u1edbi th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh chu vi ch\u00ednh x\u00e1c.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1eafm r\u00f5 c\u00f4ng th\u1ee9c t\u00ednh chu vi: B\u1edfi v\u00ec h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 h\u00ecnh t\u1ee9 gi\u00e1c \u0111\u1eb7c bi\u1ec7t c\u0169ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m nh\u01b0 m\u1ed9t s\u1ed1 h\u00ecnh kh\u00e1c, n\u00ean vi\u1ec7c n\u1eafm r\u00f5 c\u00f4ng th\u1ee9c t\u00ednh s\u1ebd tr\u00e1nh nh\u1ea7m l\u1eabn v\u1edbi c\u00e1c h\u00ecnh kh\u00e1c.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh trong ngo\u1eb7c tr\u01b0\u1edbc, nh\u00e2n 2 sau:\u00a0Nh\u01b0ng v\u1edbi c\u00f4ng th\u1ee9c t\u00ednh chu vi c\u1ee7a h\u00ecnh ch\u1eef nh\u1eadt, c\u00e1c em s\u1ebd ph\u1ea3i t\u00ednh ph\u00e9p c\u1ed9ng chi\u1ec1u d\u00e0i v\u00e0 chi\u1ec1u r\u1ed9ng trong ngo\u1eb7c tr\u01b0\u1edbc r\u1ed3i m\u1edbi nh\u00e2n v\u1edbi 2.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin v\u1ec1 ki\u1ebfn th\u1ee9c\u00a0c\u00f4ng th\u1ee9c t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt. M\u1eb7c d\u00f9 \u0111\u00e2y ch\u1ec9 l\u00e0 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n, nh\u01b0ng ch\u00ednh l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 gi\u00fap c\u00e1c em h\u1ecdc t\u1ed1t c\u00e1c ki\u1ebfn th\u1ee9c n\u00e2ng cao v\u00e0 \u1ee9ng d\u1ee5ng trong th\u1ef1c ti\u1ec5n ch\u00ednh x\u00e1c. V\u1eady n\u00ean, h\u00e3y n\u1eafm v\u1eefng \u0111\u1ec3 c\u00f3 th\u1ec3 n\u00e2ng cao th\u00e0nh t\u00edch h\u1ecdc t\u1eadp t\u1ed1t h\u01a1n nh\u00e9.<\/p>\n<p>                                    Ngu\u1ed3n tham kh\u1ea3o<\/p>\n<p>Perimeter of Rectangle &#8211; Ng\u00e0y truy c\u1eadp: 05\/10\/2022<\/p>\n<p>https:\/\/byjus.com\/maths\/perimeter-of-rectangle\/<\/p>\n<p>\u00a0How To Find The Perimeter Of A Rectangle &#8211; Ng\u00e0y truy c\u1eadp: 05\/10\/2022<\/p>\n<p>https:\/\/www.varsitytutors.com\/basic_geometry-help\/how-to-find-the-perimeter-of-a-rectangle<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u00e1ch t\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt\u00a0l\u00e0 d\u1ea1ng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 h\u00ecnh h\u1ecdc m\u00e0 c\u00e1c b\u00e9 c\u1ea5p 1 s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen, h\u1ecdc, th\u1ef1c h\u00e0nh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ea3 trong th\u1ef1c t\u1ebf. \u0110\u1ec3 gi\u00fap c\u00e1c b\u00e9 h\u1ecdc t\u1ed1t ki\u1ebfn th\u1ee9c n\u00e0y, h\u00e3y c\u00f9ng tham kh\u1ea3o chi ti\u1ebft trong b\u00e0i vi\u1ebft n\u00e0y c\u1ee7a Shining&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-17871","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17871","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=17871"}],"version-history":[{"count":1,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17871\/revisions"}],"predecessor-version":[{"id":23508,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17871\/revisions\/23508"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=17871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=17871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=17871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}