{"id":4723,"date":"2020-04-21T09:30:28","date_gmt":"2020-04-21T02:30:28","guid":{"rendered":"https:\/\/bacdau.vn\/?post_type=kb&#038;p=4723"},"modified":"2020-04-21T16:31:23","modified_gmt":"2020-04-21T09:31:23","slug":"dien-tich-hinh-thang","status":"publish","type":"kb","link":"https:\/\/bacdau.vn\/kb\/dien-tich-hinh-thang\/","title":{"rendered":"Di\u1ec7n t\u00edch h\u00ecnh thang chu\u1ea9n x\u00e1c nh\u1ea5t cho h\u1ecdc sinh"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Em \u0111ang c\u1ea7n t\u00ednh <\/span><b>di\u1ec7n t\u00edch h\u00ecnh thang<\/b><span style=\"font-weight: 400;\"> nh\u01b0ng \u0111\u00e3 l\u1ee1 qu\u00ean c\u00f4ng th\u1ee9c? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap c\u00e1c em t\u1ed5ng h\u1ee3p l\u1ea1i \u201c t\u1ea5t t\u1ea7n t\u1eadt\u201d c\u00e1c th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u00fap em gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n c\u1ee7a m\u00ecnh.C\u00f9ng bacdau.vn b\u1ed5 sung nh\u1eefng ki\u1ebfn th\u1ee9c \u0111\u00e3 m\u1ea5t ngay n\u00e0o.<\/span><\/p>\n<h2 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">T\u1ed5ng quan v\u1ec1 h\u00ecnh thang<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">X\u00e9t v\u1ec1 kh\u00e1i ni\u1ec7m, tr\u01b0\u1edbc h\u1ebft h\u00ecnh thang l\u00e0 m\u1ed9t h\u00ecnh t\u1ee9 gi\u00e1c l\u1ed3i ( t\u1ee9 gi\u00e1c m\u00e0 t\u1ea5t c\u1ea3 c\u00e1c g\u00f3c kh\u00f4ng c\u00f3 g\u00f3c n\u00e0o l\u1edbn h\u01a1n 180 \u0111\u1ed9 ) v\u00e0 c\u00f3 \u00edt nh\u1ea5t 2 c\u1ea1nh song song v\u1edbi nhau.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u00ean c\u1ea1nh kh\u00e1i ni\u1ec7m h\u00ecnh thang n\u00f3i chung, c\u00f2n m\u1ed9t s\u1ed1 kh\u00e1i ni\u1ec7m c\u1ea7n \u0111\u01b0\u1ee3c l\u00e0m r\u00f5 \u0111\u00f3 l\u00e0:<\/span><\/p>\n<ul style=\"text-align: justify;\">\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Hinh thang c\u00e2n: \u0110\u00e2y l\u00e0 m\u1ed9t h\u00ecnh thang nh\u01b0ng c\u00f3 \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00f3 2 g\u00f3c chung \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00e1y b\u1eb1ng nhau.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">H\u00ecnh thang vu\u00f4ng: C\u0169ng l\u00e0 h\u00ecnh thang nh\u01b0ng trong n\u00f3 c\u00f3 g\u00f3c vu\u00f4ng.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">H\u00ecnh b\u00ecnh h\u00ecnh: \u0110\u00e2y l\u00e0 h\u00ecnh thang \u0111\u1eb7c bi\u1ec7t nh\u1ea5t b\u1edfi thay v\u00ec ch\u1ec9 c\u00f3 1 c\u1eb7p c\u1ea1nh song song, n\u00f3 c\u00f3 t\u1edbi 2 c\u1eb7p c\u1ea1nh song song. H\u1ec7 qu\u1ea3 l\u00e0 b\u00ean trong h\u00ecnh b\u00ecnh h\u00e0nh c\u00f3 2 c\u1eb7p g\u00f3c \u0111\u1ed1i b\u1eb1ng nhau v\u00e0 m\u1ed7i c\u1eb7p g\u00f3c chung \u0111\u00e1y \u0111\u1ec1u c\u00f3 t\u1ed5ng s\u1ed1 \u0111o l\u00e0 180.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh <\/span>di\u1ec7n t\u00edch c\u1ee7a m\u1ed9t h\u00ecnh thang<span style=\"font-weight: 400;\"> c\u01a1 b\u1ea3n<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00e1ch t\u00ednh S c\u1ee7a m\u1ed9t h\u00ecnh thang\u00a0 r\u1ea5t \u0111\u01a1n gi\u1ea3n nh\u01b0ng \u0111\u1ec3 ti\u1ec7n l\u1ee3i trong s\u1eed d\u1ee5ng, ng\u01b0\u1eddi ta \u0111\u00e3 x\u00e2y d\u1ef1ng c\u00f4ng th\u1ee9c t\u00ednh <strong>di\u1ec7n t\u00edch h\u00ecnh thang<\/strong> chung v\u00e0 c\u1ea3 c\u00f4ng th\u1ee9c t\u00ednh d\u00e0nh cho c\u1ee7a nh\u1eefng h\u00ecnh thang \u0111\u1eb7c bi\u1ec7t.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c chung t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang:<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">S= h x (a+b) \/2<\/span><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter\" src=\"data:image\/jpeg;base64,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\" width=\"485\" height=\"275\" \/><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ngh\u0129a l\u00e0 <\/span><b>di\u1ec7n t\u00edch h\u00ecnh thang<\/b><span style=\"font-weight: 400;\"> \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch l\u1ea5y t\u1ed5ng 2 \u0111\u00e1y ( 2 \u0111\u00e1y c\u1ee7a h\u00ecnh thang ch\u00ednh l\u00e0 c\u1eb7p c\u1ea1nh \u0111\u1ed1i song song v\u1edbi nhau) nh\u00e2n v\u1edbi chi\u1ec1u cao ( kho\u1ea3ng c\u00e1ch vu\u00f4ng g\u00f3c gi\u1eefa hai \u0111\u00e1y) v\u00e0 chia cho 2.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang vu\u00f4ng<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n v\u1ec1 h\u00ecnh thang vu\u00f4ng r\u1ea5t \u0111\u01a1n gi\u1ea3n:<\/span><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-4727 aligncenter\" src=\"https:\/\/bacdau.vn\/wp-content\/uploads\/2020\/04\/dt-300x224.png\" alt=\"\" width=\"492\" height=\"367\" srcset=\"https:\/\/bacdau.vn\/wp-content\/uploads\/2020\/04\/dt-300x224.png 300w, https:\/\/bacdau.vn\/wp-content\/uploads\/2020\/04\/dt.png 668w\" sizes=\"(max-width: 492px) 100vw, 492px\" \/><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f4ng th\u1ee9c gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n t\u00ednh di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh thang c\u00e2n<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u1ec3 gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n t\u00ednh h\u00ecnh thang c\u00e2n ta ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c n\u00e0y:<img decoding=\"async\" loading=\"lazy\" class=\"wp-image-4730 aligncenter\" src=\"https:\/\/bacdau.vn\/wp-content\/uploads\/2020\/04\/c\u00e2n-2-300x223.png\" alt=\"\" width=\"490\" height=\"364\" srcset=\"https:\/\/bacdau.vn\/wp-content\/uploads\/2020\/04\/c\u00e2n-2-300x223.png 300w, https:\/\/bacdau.vn\/wp-content\/uploads\/2020\/04\/c\u00e2n-2.png 683w\" sizes=\"(max-width: 490px) 100vw, 490px\" \/><\/span><\/p>\n<h3 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n t\u00ednh chi\u1ec1u cao, \u0111\u00e1y nh\u1ecf, \u0111\u00e1y l\u1edbn trong m\u1ed9t h\u00ecnh thang<\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Trong ki\u1ec3m tra, h\u1ea7u h\u1ebft kh\u00f4ng gi\u00e1o vi\u00ean n\u00e0o ra \u0111\u1ec1 b\u00e0i ch\u1ec9 \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh <\/span>c\u00f3 s\u1eb5n cho h\u00ecnh thang<span style=\"font-weight: 400;\"> n\u00ean c\u00e1c b\u1ea1n c\u0169ng c\u1ea7n tham kh\u1ea3o th\u00eam v\u1ec1 c\u00e1ch t\u00ednh chi\u1ec1u cao, \u0111\u00e1y nh\u1ecf v\u00e0 \u0111\u00e1y l\u1edbn c\u1ee7a m\u1ed9t h\u00ecnh thang.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 c\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh chi\u1ec1u cao h\u00ecnh thang khi bi\u1ebft \u0111\u1ed9 d\u00e0i ch\u00ednh x\u00e1c hai \u0111\u00e1y.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 c\u00f4ng th\u1ee9c t\u00ednh chi\u1ec1u d\u00e0i hai \u0111\u00e1y khi bi\u1ebft chu\u1ea9n x\u00e1c di\u1ec7n t\u00edch :<\/span><\/p>\n<p style=\"text-align: justify;\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium aligncenter\" src=\"https:\/\/apecceosummit2017.com.vn\/wp-content\/uploads\/2019\/10\/giai-bai-3.png\" width=\"742\" height=\"601\" \/><\/p>\n<h2 style=\"text-align: justify;\"><span style=\"font-weight: 400;\">L\u01b0u \u00fd trong gi\u1ea3i quy\u1ebft di\u1ec7n t\u00edch h\u00ecnh thang<\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng b\u00e0i to\u00e1n c\u0103n b\u1ea3n c\u1ee7a h\u00ecnh h\u1ecdc l\u1edbp 4, khi cho c\u00e1c em ti\u1ebfp x\u00fac v\u1edbi c\u00f4ng th\u1ee9c c\u1ea7n gi\u00fap c\u00e1c em nh\u1eadn bi\u1ebft r\u00f5 c\u00e1c c\u1eb7p c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh thang.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Khi l\u00ean c\u00e1c l\u1edbp cao h\u01a1n, \u0111\u00f2i h\u1ecfi t\u01b0 duy \u1edf giai \u0111o\u1ea1n cao v\u00ec v\u1eady ngo\u1ea1i tr\u1eeb nh\u1eefng l\u00fd thuy\u1ebft c\u01a1 b\u1ea3n c\u00e1c em c\u00f2n ph\u1ea3i quan t\u00e2m h\u01a1n \u0111\u1ebfn h\u00ecnh thang \u0111\u1eb7c bi\u1ec7t v\u00e0 c\u00f4ng th\u1ee9c c\u1ee7a ch\u00fang, v\u1eadn d\u1ee5ng m\u1ed9t c\u00e1ch linh ho\u1ea1t c\u00e1c c\u00f4ng th\u1ee9c k\u1ebft h\u1ee3p v\u1edbi ki\u1ebfn th\u1ee9c \u0111\u01b0\u1ee3c h\u1ecdc trong ch\u01b0\u01a1ng tr\u00ecnh s\u1ebd gi\u00fap c\u00e1c em c\u00f3 \u0111i\u1ec3m s\u1ed1 cao trong h\u1ecdc t\u1eadp.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c n\u1ec1n t\u1ea3ng \u0111\u1ec3 gi\u00fap c\u00e1c em gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n li\u00ean quan t\u1edbi <\/span><b>di\u1ec7n t\u00edch h\u00ecnh thang<\/b><span style=\"font-weight: 400;\">. Ch\u00fac c\u00e1c em h\u1ecdc t\u1eadp th\u1eadt hi\u1ec7u qu\u1ea3!!!!<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o th\u00eam: <\/span><a href=\"https:\/\/bacdau.vn\/tich-vo-huong-tich-co-huong-2\/\"><span style=\"font-weight: 400;\">B\u00e0i to\u00e1n v\u1ec1 vecto<\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Em \u0111ang c\u1ea7n t\u00ednh di\u1ec7n t\u00edch h\u00ecnh thang nh\u01b0ng \u0111\u00e3 l\u1ee1 qu\u00ean c\u00f4ng th\u1ee9c? B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u00fap c\u00e1c em t\u1ed5ng h\u1ee3p l\u1ea1i \u201c t\u1ea5t t\u1ea7n t\u1eadt\u201d c\u00e1c th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 gi\u00fap em gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n c\u1ee7a m\u00ecnh.C\u00f9ng bacdau.vn b\u1ed5 sung nh\u1eefng ki\u1ebfn th\u1ee9c \u0111\u00e3 m\u1ea5t ngay n\u00e0o.<\/p>\n","protected":false},"author":1,"featured_media":4726,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"kbtopic":[764],"kbtag":[766],"_links":{"self":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kb\/4723"}],"collection":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kb"}],"about":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/types\/kb"}],"author":[{"embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/comments?post=4723"}],"version-history":[{"count":0,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kb\/4723\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/media\/4726"}],"wp:attachment":[{"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/media?parent=4723"}],"wp:term":[{"taxonomy":"kbtopic","embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kbtopic?post=4723"},{"taxonomy":"kbtag","embeddable":true,"href":"https:\/\/bacdau.vn\/wp-json\/wp\/v2\/kbtag?post=4723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}