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{"id":30206,"date":"2018-05-13T14:01:42","date_gmt":"2018-05-13T07:01:42","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=30206"},"modified":"2018-05-13T14:01:42","modified_gmt":"2018-05-13T07:01:42","slug":"hinh-hoc-cau-ho%cc%89i-trac-nghie%cc%a3m-chuong-2","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/hinh-hoc-cau-ho%cc%89i-trac-nghie%cc%a3m-chuong-2\/","title":{"rendered":"H\u00ecnh H\u1ecdc – C\u00e2u ho\u0309i tr\u0103\u0301c nghi\u00ea\u0323m ch\u01b0\u01a1ng 2"},"content":{"rendered":"

B\u00e0i 1 (trang 78 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0T\u00ecm m\u1ec7nh \u0111\u1ec1 sai trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y:<\/p>\n

(A) N\u1ebfu hai m\u1eb7t ph\u1eb3ng c\u00f3 m\u1ed9t \u0111i\u1ec3m chung th\u00ec ch\u00fang c\u00f2n c\u00f3 v\u00f4 s\u1ed1 \u0111i\u1ec3m chung kh\u00e1c n\u1eefa;<\/p>\n

(B) N\u1ebfu hai m\u1eb7t ph\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng song song v\u1edbi m\u1eb7t ph\u1eb3ng th\u1ee9 3 th\u00ec ch\u00fang song song v\u1edbi nhau;<\/p>\n

(C) N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng song song v\u1edbi m\u1ed9t m\u1eb7t ph\u1eb3ng th\u00ec song song v\u1edbi nhau;<\/p>\n

(D) N\u1ebfu m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng c\u1eaft m\u1ed9t trong hai m\u1eb7t ph\u1eb3ng song song v\u1edbi nhau th\u00ec ch\u00fang s\u1ebd c\u1eaft m\u1eb7t ph\u1eb3ng c\u00f2n l\u1ea1i.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn C. 2 \u0111\u01b0\u1eddng th\u1eb3ng c\u00f3 th\u1ec3 tr\u00f9ng ho\u1eb7c c\u1eaft nhau, ch\u00e9o nhau.<\/p>\n

B\u00e0i 2 (trang 78 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0N\u1ebfu ba \u0111\u01b0\u1eddng th\u1eb3ng kh\u00f4ng c\u00f9ng n\u1eb1m trong m\u1ed9t m\u1eb7t ph\u1eb3ng v\u00e0 \u0111\u00f4i m\u1ed9t c\u1eaft nhau th\u00ec ba \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u00f3<\/p>\n

(A) \u0110\u1ed3ng quy<\/p>\n

(B) T\u1ea1o th\u00e0nh tam gi\u00e1c<\/p>\n

(C) Tr\u00f9ng nhau<\/p>\n

(D) C\u00f9ng song song v\u1edbi m\u1ed9t m\u1eb7t ph\u1eb3ng<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn A. \u0110\u1ecbnh l\u00fd v\u1ec1 giao tuy\u1ebfn c\u1ee7a ba m\u1eb7t ph\u1eb3ng.<\/p>\n

B\u00e0i 3 (trang 78 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0Cho t\u1ee9 di\u1ec7n ABCD. G\u1ecdi I,J,K l\u1ea7n l\u01b0\u1ee3t l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AC, BC v\u00e0 BD (h\u00ecnh b\u00ean). Giao tuy\u1ebfn c\u1ee7a hai m\u1eb7t ph\u1eb3ng (ABD) v\u00e0 (IJK) l\u00e0<\/p>\n

\"\"<\/p>\n

(A) KD;<\/p>\n

(B) KI;<\/p>\n

(C) \u0110\u01b0\u1eddng th\u1eb3ng qua K v\u00e0 song song v\u1edbi AB;<\/p>\n

(D) Kh\u00f4ng c\u00f3.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn C.<\/p>\n

IJ\/\/AB => IJ\/\/(ABD) => (IJK) c\u1eaft (ABD) theo giao tuy\u1ebfn qua K v\u00e0 song song v\u1edbi AB.<\/p>\n

B\u00e0i 4 (trang 79 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0T\u00ecm m\u1ec7nh \u0111\u1ec1 \u0111\u00fang trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau:<\/p>\n

(A) N\u1ebfu hai m\u1eb7t ph\u1eb3ng (\u03b1) v\u00e0 (\u03b2) song song v\u1edbi nhau th\u00ec m\u1ecdi \u0111\u01b0\u1eddng th\u1eb3ng n\u1eb1m trong hai m\u1eb7t ph\u1eb3ng (\u03b1) \u0111\u1ec1u song song v\u1edbi (\u03b2);<\/p>\n

(B) N\u1ebfu hai m\u1eb7t ph\u1eb3ng (\u03b1) v\u00e0 (\u03b2) song song v\u1edbi nhau th\u00ec m\u1ecdi \u0111\u01b0\u1eddng th\u1eb3ng n\u1eb1m trong (\u03b1) \u0111\u1ec1u song song v\u1edbi m\u1ecdi \u0111\u01b0\u1eddng th\u1eb3ng n\u1eb1m trong (\u03b2);<\/p>\n

(C) N\u1ebfu hai \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi nhau l\u1ea7n l\u01b0\u1ee3t n\u1eb1m trong hai m\u1eb7t ph\u1eb3ng ph\u00e2n bi\u1ec7t (\u03b1) v\u00e0(\u03b2) th\u00ec (\u03b1) v\u00e0(\u03b2) song song v\u1edbi nhau;<\/p>\n

(D) Qua m\u1ed9t \u0111i\u1ec3m n\u1eb1m ngo\u00e0i m\u1eb7t ph\u1eb3ng cho tr\u01b0\u1edbc ta v\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t v\u00e0 ch\u1ec9 m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng song song v\u1edbi m\u1eb7t ph\u1eb3ng cho tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn A. (Theo \u0111\u1ecbnh ngh\u0129a hai m\u1eb7t ph\u1eb3ng song song)<\/p>\n

B\u00e0i 5 (trang 79 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0. Cho t\u1ee9 di\u1ec7n ABCD. G\u1ecdi M v\u00e0 N l\u1ea7n l\u01b0\u1ee3t l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AB v\u00e0 AC, E l\u00e0 \u0111i\u1ec3m tr\u00ean c\u1ea1nh CD v\u1edbi ED=3EC. Thi\u1ebft di\u1ec7n t\u1ea1o m\u1eb7t ph\u1eb3ng (MNE) v\u00e0 t\u1ee9 di\u1ec7n ABCD l\u00e0:<\/p>\n

\"\"<\/p>\n

(A) Tam gi\u00e1c MNE;<\/p>\n

(B) T\u1ee9 gi\u00e1c MNEF v\u1edbi F l\u00e0 \u0111i\u1ec3m b\u1ea5t k\u00ec tr\u00ean c\u1ea1nh BD<\/p>\n

(C) H\u00ecnh b\u00ecnh h\u00e0nh MNEF v\u1edbi F l\u00e0 \u0111i\u1ec3m tr\u00ean c\u1ea1nh BD m\u00e0 EF\/\/BC;<\/p>\n

(D) H\u00ecnh thang MNEF v\u1edbi F l\u00e0 \u0111i\u1ec3m tr\u00ean c\u1ea1nh BD m\u00e0 EF\/\/BC.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn D.<\/p>\n

B\u00e0i 6 (trang 79 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0Cho h\u00ecnh l\u0103ng tr\u1ee5 tam gi\u00e1c ABC.A\u2019B\u2019C\u2019. G\u1ecdi I,J l\u1ea7n l\u01b0\u1ee3t l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a c\u00e1c tam gi\u00e1c ABC v\u00e0 A\u2019B\u2019C\u2019. Thi\u1ebft di\u1ec7n t\u1ea1o b\u1edfi m\u1eb7t ph\u1eb3ng (AIJ) v\u1edbi h\u00ecnh l\u0103ng tr\u1ee5 \u0111\u00e3 cho l\u00e0<\/p>\n

\"\"<\/p>\n

(A) Tam gi\u00e1c c\u00e2n;<\/p>\n

(B) Tam gi\u00e1c vu\u00f4ng;<\/p>\n

(C) H\u00ecnh thang;<\/p>\n

(D) H\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn D. G\u1ecdi M v\u00e0 N l\u1ea7n l\u01b0\u1ee3t l\u00e0 trung \u0111i\u1ec3m c\u1ee7a BC v\u00e0 B\u2019C\u2019. Thi\u1ebft di\u1ec7n l\u00e0 h\u00ecnh b\u00ecnh h\u00e0nh A\u2019AMN.<\/p>\n

B\u00e0i 7 (trang 79 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0Cho t\u1ee9 di\u1ec7n \u0111\u1ec1u S.ABC c\u1ea1nh b\u1eb1ng a. G\u1ecdi I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n AB, M l\u00e0 \u0111i\u1ec3m di \u0111\u1ed9ng tr\u00ean \u0111o\u1ea1n AI. Qua M v\u1ebd m\u1eb7t ph\u1eb3ng(\u03b1) song song v\u1edbi (SIC). Thi\u1ebft di\u1ec7n t\u1ea1o b\u1edfi (\u03b1) v\u00e0 t\u1ee9 di\u1ec7n S.ABC l\u00e0<\/p>\n

(A) Tam gi\u00e1c c\u00e2n t\u1ea1i M<\/p>\n

(B) Tam gi\u00e1c \u0111\u1ec1u<\/p>\n

(C) H\u00ecnh b\u00ecnh h\u00e0nh<\/p>\n

(D) H\u00ecnh thoi<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

\"\"<\/p>\n

Ch\u1ecdn A. Ta c\u00f3 SI=CI => MN=MP.<\/p>\n

B\u00e0i 8 (trang 80 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0V\u1edbi gi\u1ea3 thi\u1ebft c\u1ee7a b\u00e0i t\u1eadp 7, chu vi c\u1ee7a thi\u1ebft di\u1ec7n t\u00ednh theo AM=x l\u00e0<\/p>\n

\"\"<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn B.<\/p>\n

\"\"<\/p>\n

B\u00e0i 9 (trang 80 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0Cho h\u00ecnh b\u00ecnh h\u00e0nh ABCD. G\u1ecdi Bx, Cy, Dz l\u00e0 c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng song song l\u1ea7n l\u01b0\u1ee3t v\u1edbi nhau \u0111i qua B,C,D v\u00e0 n\u1eb1m v\u1ec1 m\u1ed9t ph\u00eda c\u1ee7a m\u1eb7t ph\u1eb3ng (ABCD), \u0111\u1ed3ng th\u1eddi kh\u00f4ng n\u1eb1m trong m\u1eb7t ph\u1eb3ng (ABCD). M\u1ed9t m\u1eb7t ph\u1eb3ng \u0111i qua A v\u00e0 c\u1eaft Bx,Cy,Dz l\u1ea7n l\u01b0\u1ee3t t\u1ea1i B\u2019,C\u2019,D\u2019 v\u1edbi BB\u2019=2, DD\u2019=4. Khi \u0111\u00f3 CC\u2019 b\u1eb1ng<\/p>\n

(A)3;<\/p>\n

(B)4;<\/p>\n

(C)5;<\/p>\n

(D)6.<\/p>\n

\"\"<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn D. G\u1ecdi O v\u00e0 O\u2019l\u1ea7n l\u01b0\u1ee3t l\u00e0 t\u00e2m c\u00e1c h\u00ecnh b\u00ecnh h\u00e0nh ABCD v\u00e0 AB\u2019C\u2019D\u2019. Ta c\u00f3:<\/p>\n

BB\u2019+DD\u2019=2OO\u2019=CC\u2019=>CC\u2019=6<\/p>\n

B\u00e0i 10 (trang 80 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0T\u00ecm m\u1ec7nh \u0111\u1ec1 \u0111\u00fang trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau:<\/p>\n

(A) Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ebft c\u00f9ng n\u1eb1m trong m\u1ed9t m\u1eb7t ph\u1eb3ng th\u00ec kh\u00f4ng ch\u00e9o nhau;<\/p>\n

(B) Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t kh\u00f4ng c\u1eaft nhau th\u00ec ch\u00e9o nhau;<\/p>\n

(C) Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t kh\u00f4ng song song th\u00ec ch\u00e9o nhau;<\/p>\n

(D) Hai \u0111\u01b0\u1eddng th\u1eb3ng ph\u00e2n bi\u1ec7t l\u1ea7n l\u01b0\u1ee3t thu\u1ed9c hai m\u1eb7t ph\u1eb3ng kh\u00e1c nhau th\u00ec ch\u00e9o nhau.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn A. Xem l\u1ea1i \u0111\u1ecbnh ngh\u0129a.<\/p>\n

B\u00e0i 11 (trang 80 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0Cho h\u00ecnh vu\u00f4ng ABCD v\u00e0 tam gi\u00e1c \u0111\u1ec1u SAB n\u1eb1m trong hai m\u1eb7t ph\u1eb3ng kh\u00e1c nhau. G\u1ecdi M l\u00e0 \u0111i\u1ec3m di \u0111\u1ed9ng tr\u00ean \u0111o\u1ea1n Ab. Qua M v\u1ebd m\u1eb7t ph\u1eb3ng (\u03b1) song song v\u1edbi( SBC). Thi\u1ebft di\u1ec7n t\u1ea1o b\u1edfi (\u03b1) v\u00e0 h\u00ecnh ch\u00f3p S.ABCD l\u00e0 h\u00ecnh g\u00ec?<\/p>\n

(A) Tam gi\u00e1c;<\/p>\n

(B) H\u00ecnh b\u00ecnh h\u00e0nh;<\/p>\n

(C ) H\u00ecnh thang;<\/p>\n

(D) H\u00ecnh vu\u00f4ng.<\/p>\n

\"\"<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn C. Thi\u1ebft di\u1ec7n l\u00e0 h\u00ecnh thang MNPQ.<\/p>\n

B\u00e0i 12 (trang 80 SGK H\u00ecnh h\u1ecdc 11):<\/b>\u00a0V\u1edbi gi\u1ea3 thi\u1ebft c\u1ee7a b\u00e0i t\u1eadp 11, g\u1ecdi N, P, Q l\u1ea7n l\u01b0\u1ee3t l\u00e0 giao c\u1ee7a m\u1eb7t ph\u1eb3ng (\u03b1) v\u1edbi c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng CD,DS,SA. T\u1eadp h\u1ee3p c\u00e1c giao \u0111i\u1ec3m I c\u1ee7a hai \u0111\u01b0\u1eddng th\u1eb3ng MQ v\u00e0 NP l\u00e0<\/p>\n

(A) \u0110\u01b0\u1eddng th\u1eb3ng;<\/p>\n

(B) N\u1eeda \u0111\u01b0\u1eddng th\u1eb3ng;<\/p>\n

(C) \u0110o\u1ea1n th\u1eb3ng song song v\u1edbi AB;<\/p>\n

(D) T\u1eadp h\u1ee3p r\u1ed7ng.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn C.<\/p>\n

MQ \u2282(SAB), NP\u2282(SCD)=>I\u2208(SAB)\u2229(SCD).<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

B\u00e0i 1 (trang 78 SGK H\u00ecnh h\u1ecdc 11):\u00a0T\u00ecm m\u1ec7nh \u0111\u1ec1 sai trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y: (A) N\u1ebfu hai m\u1eb7t ph\u1eb3ng c\u00f3 m\u1ed9t \u0111i\u1ec3m chung th\u00ec ch\u00fang c\u00f2n c\u00f3 v\u00f4 s\u1ed1 \u0111i\u1ec3m chung kh\u00e1c n\u1eefa; (B) N\u1ebfu hai m\u1eb7t ph\u1eb3ng ph\u00e2n bi\u1ec7t c\u00f9ng song song v\u1edbi m\u1eb7t ph\u1eb3ng th\u1ee9 3 th\u00ec ch\u00fang song song […]<\/p>\n","protected":false},"author":3,"featured_media":30207,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1318],"tags":[1464,1463],"yoast_head":"\nH\u00ecnh H\u1ecdc - C\u00e2u ho\u0309i tr\u0103\u0301c nghi\u00ea\u0323m ch\u01b0\u01a1ng 2<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/hinh-hoc-cau-ho\u0309i-trac-nghie\u0323m-chuong-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"H\u00ecnh H\u1ecdc - C\u00e2u ho\u0309i tr\u0103\u0301c nghi\u00ea\u0323m ch\u01b0\u01a1ng 2\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 78 SGK H\u00ecnh h\u1ecdc 11):\u00a0T\u00ecm m\u1ec7nh \u0111\u1ec1 sai trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y: (A) N\u1ebfu hai m\u1eb7t ph\u1eb3ng c\u00f3 m\u1ed9t \u0111i\u1ec3m chung th\u00ec ch\u00fang c\u00f2n c\u00f3 v\u00f4 s\u1ed1 \u0111i\u1ec3m chung kh\u00e1c n\u1eefa; 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