C\u00e2u 15:<\/b>\u00a0Cho h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0m tam gi\u00e1c vu\u00f4ng \u1edf A, g\u00f3c ACB = 30o<\/sup>\u00a0. H\u00ecnh chi\u1ebfu c\u1ee7a S l\u00ean \u0111\u00e1y tr\u00f9ng v\u1edbi tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c ABC. SA t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 60o<\/sup>\u00a0v\u00e0 SA = 4. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABC<\/p>\n A. V = 6 \u00a0\u00a0\u00a0B. V = 8 \u00a0\u00a0\u00a0C. V = 9 \u00a0\u00a0\u00a0D. V = 12<\/p>\n C\u00e2u 16:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p t\u1ee9 gi\u00e1c \u0111\u1ec1u S.ABCD, c\u00f3 c\u1ea1nh b\u00ean b\u1eb1ng 2a, g\u00f3c gi\u1eefa c\u1ea1nh b\u00ean v\u00e0 m\u1eb7t \u0111\u00e1y b\u1eb1ng 60o<\/sup><\/p>\n <\/p>\n C\u00e2u 17:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p t\u1ee9 gi\u00e1c \u0111\u1ec1u S.ABCD, di\u1ec7n t\u00edch m\u1eb7t b\u00ean b\u1eb1ng \u221a3a2<\/sup>\/6 , g\u00f3c gi\u1eefa m\u1eb7t b\u00ean v\u00e0 m\u1eb7t \u0111\u00e1y b\u1eb1ng 30o<\/sup><\/p>\n <\/p>\n C\u00e2u 18:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p t\u1ee9 gi\u00e1c \u0111\u1ec1u c\u00f3 c\u00e1c c\u1ea1nh b\u1eb1ng a.<\/p>\n <\/p>\n C\u00e2u 19:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p t\u1ee9 gi\u00e1c \u0111\u1ec1u S.ABCD c\u00f3 c\u1ea1nh \u0111\u00e1y b\u1eb1ng a. C\u1ea1nh b\u00ean t\u1ea1o v\u1edbi m\u1eb7t \u0111\u00e1y g\u00f3c 60o<\/sup><\/p>\n <\/p>\n C\u00e2u 20:<\/b>\u00a0Cho h\u00ecnh ch\u00f3p S.ABC c\u00f3 c\u00e1c c\u1ea1nh b\u00ean \u0111\u00f4i m\u1ed9t vu\u00f4ng g\u00f3c v\u1edbi nhau, SA= 6, SB = 4, SC = 5. G\u1ecdi M, P l\u1ea7n l\u01b0\u1ee3t l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AB, CA. T\u00ednh th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p S.MBCP<\/p>\n A. V = 5 \u00a0\u00a0\u00a0B. V = 15 \u00a0\u00a0\u00a0C. V = 30 \u00a0\u00a0\u00a0D. V = 45<\/p>\n C\u00e2u 21:<\/b>\u00a0Cho h\u00ecnh ch\u00f3p S.ABC. M, N, P l\u1ea7n l\u01b0\u1ee3t l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AB, BC, CA . G\u1ecdi V l\u00e0 th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p S.ABC, V\u2019 l\u00e0 th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p S.MNP.<\/p>\n <\/p>\n C\u00e2u 22:<\/b>\u00a0Cho t\u1ee9 di\u1ec7n ABCD c\u00f3 th\u1ec3 t\u00edch b\u1eb1ng 60cm3<\/sup>. G\u1ecdi G l\u00e0 tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c BCD. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a t\u1ee9 di\u1ec7n ABCG.<\/p>\n A. V = 45(cm3<\/sup>) \u00a0\u00a0\u00a0B. V = 40(cm3<\/sup>) \u00a0\u00a0\u00a0C. V = 30(cm3<\/sup>)\u00a0\u00a0\u00a0 D. V = 20(cm3<\/sup>)<\/p>\n C\u00e2u 23:<\/b>\u00a0Cho t\u1ee9 di\u1ec7n ABCD c\u00f3 AB vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng (BCD), BC = BD. G\u1ecdi I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a CD. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a t\u1ee9 di\u1ec7n \u0111\u00f3. Bi\u1ebft r\u1eb1ng AB = 4, AI = 5, CD=6.<\/p>\n A. V = 6 \u00a0\u00a0\u00a0B. V = 12\u00a0\u00a0\u00a0C. V = 18\u00a0\u00a0\u00a0D. V = 36<\/p>\n C\u00e2u 24:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD. Bi\u1ebft r\u1eb1ng ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh a, SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y v\u00e0 di\u1ec7n t\u00edch tam gi\u00e1c SAC b\u1eb1ng<\/p>\n <\/p>\n H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n <\/p>\n C\u00e2u 19:<\/b><\/p>\n G\u1ecdi H = AC \u2229 BD, khi \u0111\u00f3 SH \u22a5 (ABCD), g\u00f3c SAH = 60o<\/sup>; SH = AH.tan60o<\/sup><\/p>\n C\u00e2u 23:<\/b><\/p>\n V b\u1eb1ng th\u1ec3 t\u00edch h\u00ecnh ch\u00f3p A.BCD<\/p>\n","protected":false},"excerpt":{"rendered":" C\u00e2u 15:\u00a0Cho h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0m tam gi\u00e1c vu\u00f4ng \u1edf A, g\u00f3c ACB = 30o\u00a0. H\u00ecnh chi\u1ebfu c\u1ee7a S l\u00ean \u0111\u00e1y tr\u00f9ng v\u1edbi tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c ABC. SA t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 60o\u00a0v\u00e0 SA = 4. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABC A. V = 6 \u00a0\u00a0\u00a0B. […]<\/p>\n","protected":false},"author":3,"featured_media":28885,"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":"\n\n\n
\n 15-C<\/td>\n 16-A<\/td>\n 17-C<\/td>\n 18-D<\/td>\n 19-A<\/td>\n 20-B<\/td>\n 21-C<\/td>\n 22-D<\/td>\n 23-B<\/td>\n 24-A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n