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{"id":28925,"date":"2018-04-27T17:19:59","date_gmt":"2018-04-27T10:19:59","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=28925"},"modified":"2018-04-27T17:19:59","modified_gmt":"2018-04-27T10:19:59","slug":"bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-bai-3-the-tich-khoi-da-dien-phan-1","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-bai-3-the-tich-khoi-da-dien-phan-1\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m H\u00ecnh h\u1ecdc 12 \u2013 Ch\u01b0\u01a1ng 1 – B\u00e0i 3: Th\u1ec3 t\u00edch kh\u1ed1i \u0111a di\u1ec7n (Ph\u1ea7n 1)"},"content":{"rendered":"

C\u00e2u 1:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u00f3 c\u1ea1nh b\u1eb1ng a, SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y, kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (SBC) b\u1eb1ng \u221a3a\/4 . Th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p S.ABC l\u00e0:<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

C\u00e2u 2:<\/b>\u00a0Cho h\u00ecnh ch\u00f3p S.ABC, c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c vu\u00f4ng \u1edf A, SC vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y, AC = a\/2, SC = BC = a\u221a2 . M\u1eb7t ph\u1eb3ng (P) qua C vu\u00f4ng g\u00f3c v\u1edbi SB c\u1eaft SA, SB l\u1ea7n l\u01b0\u1ee3t t\u1ea1i A\u2019, B\u2019. G\u1ecdi V l\u00e0 th\u1ec3 t\u00edch h\u00ecnh ch\u00f3p S.ABC, V\u2019 l\u00e0 th\u1ec3 t\u00edch h\u00ecnh ch\u00f3p S.A\u2019B\u2019C. T\u00ednh t\u1ec9 s\u1ed1 k = V’\/V<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

C\u00e2u 3:<\/b>\u00a0Cho h\u00ecnh ch\u00f3p S.ABC, c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c vu\u00f4ng \u1edf A, SC vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y, AC = a\/2, SC = BC = a\u221a2. M\u1eb7t ph\u1eb3ng (P) qua C vu\u00f4ng g\u00f3c v\u1edbi SB c\u1eaft SA, SB l\u1ea7n l\u01b0\u1ee3t t\u1ea1i A\u2019, B\u2019. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.A\u2019B\u2019C.<\/p>\n

\"\"<\/p>\n

C\u00e2u 4:<\/b>\u00a0(\u0110\u1ec1 thi minh h\u1ecda m\u00f4n to\u00e1n k\u00ec thi THPTQG n\u0103m 2017 c\u1ee7a b\u1ed9 GD-\u0110T)<\/p>\n

Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u1eb1ng a\u221a2 , tam gi\u00e1c SAD c\u00e2n t\u1ea1i S, m\u1eb7t b\u00ean (SAD) vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng \u0111\u00e1y. Bi\u1ebft th\u1ec3 t\u00edch S.ABCD b\u1eb1ng 4a3<\/sup>\/3. T\u00ednh kho\u1ea3ng c\u00e1ch h t\u1eeb B \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (SCD).<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

C\u00e2u 5:<\/b>\u00a0Cho t\u1ee9 di\u1ec7n ABCD, c\u00f3 c\u00e1c c\u1ea1nh DA, DB, DC \u0111\u00f4i m\u1ed9t vu\u00f4ng g\u00f3c v\u1edbi nhau. Bi\u1ebft r\u1eb1ng DA = a, DB = a\u221a2, DC = 2a. T\u00ednh di\u1ec7n t\u00edch S c\u1ee7a tam gi\u00e1c ABC.<\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n\n\n\n
1-D<\/td>\n2-C<\/td>\n3-A<\/td>\n4-B<\/td>\n5-D<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

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

C\u00e2u 1:\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u00f3 c\u1ea1nh b\u1eb1ng a, SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y, kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (SBC) b\u1eb1ng \u221a3a\/4 . Th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p S.ABC l\u00e0: C\u00e2u 2:\u00a0Cho h\u00ecnh ch\u00f3p S.ABC, c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c vu\u00f4ng \u1edf A, […]<\/p>\n","protected":false},"author":3,"featured_media":28926,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[157],"tags":[1450,1448],"yoast_head":"\nB\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m H\u00ecnh h\u1ecdc 12 \u2013 Ch\u01b0\u01a1ng 1 - B\u00e0i 3: Th\u1ec3 t\u00edch kh\u1ed1i \u0111a di\u1ec7n (Ph\u1ea7n 1)<\/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\/bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-bai-3-the-tich-khoi-da-dien-phan-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m H\u00ecnh h\u1ecdc 12 \u2013 Ch\u01b0\u01a1ng 1 - B\u00e0i 3: Th\u1ec3 t\u00edch kh\u1ed1i \u0111a di\u1ec7n (Ph\u1ea7n 1)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 1:\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u00f3 c\u1ea1nh b\u1eb1ng a, SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y, kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (SBC) b\u1eb1ng \u221a3a\/4 . 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