C\u00e2u 53:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a kh\u1ed1i l\u0103ng tr\u1ee5 tam gi\u00e1c \u0111\u1ec1u ABC.A’B’C’ , c\u00f3 c\u1ea1nh \u0111\u00e1y b\u1eb1ng a, kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (A\u2019BC) b\u1eb1ng<\/p>\n
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C\u00e2u 54:<\/b>\u00a0Cho h\u00ecnh l\u0103ng tr\u1ee5 \u0111\u1ee9ng ABC.A’B’C’ c\u00f3 A’BC l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh b\u1eb1ng a, h\u00ecnh chi\u1ebfu c\u1ee7a A l\u00ean m\u1eb7t ph\u1eb3ng (A\u2019BC) tr\u00f9ng v\u1edbi tr\u1ecdng t\u00e2m c\u1ee7a tam gi\u00e1c A\u2019BC. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh l\u0103ng tr\u1ee5 \u0111\u00f3.<\/p>\n
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C\u00e2u 55:<\/b>\u00a0Cho h\u00ecnh l\u0103ng tr\u1ee5 ABC.A’B’C’ . G\u1ecdi V l\u00e0 th\u1ec3 t\u00edch t\u1ee9 di\u1ec7n ABA\u2019C\u2019, V\u2019 l\u00e0 th\u1ec3 t\u00edch t\u1ee9 di\u1ec7n ABB\u2019C\u2019.<\/p>\n
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C\u00e2u 56:<\/b>\u00a0Cho h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt ABCD.A’B’C’D’ c\u00f3 AA’ = a, AB = b, AD = c. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a kh\u1ed1i t\u1ee9 di\u1ec7n ACB\u2019D\u2019<\/p>\n
A. V = abc\/2\u00a0\u00a0\u00a0B. V = abc\/3\u00a0\u00a0\u00a0C. V = abc\/4\u00a0\u00a0\u00a0D. V = abc\/6<\/p>\n
C\u00e2u 57:<\/b>\u00a0G\u1ecdi V l\u00e0 th\u1ec3 t\u00edch kh\u1ed1i h\u1ed9p ABCD.A’B’C’D’, V\u2019 l\u00e0 th\u1ec3 t\u00edch kh\u1ed1i t\u1ee9 di\u1ec7n ACB\u2019D\u2019. T\u00ednh t\u1ec9 s\u1ed1 k = V’\/V.<\/p>\n
A. k = 1\/6 \u00a0\u00a0\u00a0B. k = 1\/4 \u00a0\u00a0\u00a0C. k = 1\/3 \u00a0\u00a0\u00a0D. k = 1\/2<\/p>\n
C\u00e2u 58:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt ABCD.A’B’C’D’ , c\u00f3 AB’ = \u221a5, AD’ = \u221a10, B’D’ = \u221a13.<\/p>\n
A. V=6 \u00a0\u00a0\u00a0B. V=9\u00a0\u00a0\u00a0C. V=12\u00a0\u00a0\u00a0D. V=26<\/p>\n
C\u00e2u 59:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt ABCD.A’B’C’D’ c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh a, di\u1ec7n t\u00edch tam gi\u00e1c A\u2019BD b\u1eb1ng<\/p>\n
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C\u00e2u 60:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt ABCD.A’B’C’D’ c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh a, kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (A\u2019BD) b\u1eb1ng<\/p>\n
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C\u00e2u 61:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt ABCD.A’B’C’D’ , bi\u1ebft r\u1eb1ng A\u2019BD l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh b\u1eb1ng a<\/p>\n
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H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n C\u00e2u 54:<\/b><\/p>\n G\u1ecdi H l\u00e0 h\u00ecnh chi\u1ebfu c\u1ee7a A l\u00ean m\u1eb7t ph\u1eb3ng (A\u2019BC). V\u00ec tam gi\u00e1c A\u2019BC \u0111\u1ec1u n\u00ean HA’ = HB = HC.<\/p>\n Suy ra AA’ = AB = AC = a\/\u221a2 v\u00e0 g\u00f3c BAC = 90o<\/sup><\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" C\u00e2u 53:\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a kh\u1ed1i l\u0103ng tr\u1ee5 tam gi\u00e1c \u0111\u1ec1u ABC.A’B’C’ , c\u00f3 c\u1ea1nh \u0111\u00e1y b\u1eb1ng a, kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (A\u2019BC) b\u1eb1ng C\u00e2u 54:\u00a0Cho h\u00ecnh l\u0103ng tr\u1ee5 \u0111\u1ee9ng ABC.A’B’C’ c\u00f3 A’BC l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh b\u1eb1ng a, h\u00ecnh chi\u1ebfu c\u1ee7a A l\u00ean m\u1eb7t ph\u1eb3ng (A\u2019BC) tr\u00f9ng v\u1edbi tr\u1ecdng […]<\/p>\n","protected":false},"author":3,"featured_media":28845,"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 53-C<\/td>\n 54-A<\/td>\n 55-C<\/td>\n 56-B<\/td>\n 57-C<\/td>\n 58-A<\/td>\n 59-B<\/td>\n 60-C<\/td>\n 61-B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n