B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m H\u00ecnh h\u1ecdc 12 \u2013 Ch\u01b0\u01a1ng 1 - \u00d4n t\u1eadp ch\u01b0\u01a1ng 1 (Ph\u1ea7n 3)<\/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-on-tap-chuong-1-phan-3\/\" \/>\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 - \u00d4n t\u1eadp ch\u01b0\u01a1ng 1 (Ph\u1ea7n 3)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 15:\u00a0Cho h\u00ecnh thang c\u00e2n c\u00f3 c\u1ea1nh \u0111\u00e1y AB = a, c\u1ea1nh \u0111\u00e1y DC = 3a, g\u00f3c ADC = 45o. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD. 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T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD. 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{"id":28809,"date":"2018-04-27T16:34:31","date_gmt":"2018-04-27T09:34:31","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=28809"},"modified":"2018-04-27T16:34:31","modified_gmt":"2018-04-27T09:34:31","slug":"bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-on-tap-chuong-1-phan-3","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-on-tap-chuong-1-phan-3\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m H\u00ecnh h\u1ecdc 12 \u2013 Ch\u01b0\u01a1ng 1 – \u00d4n t\u1eadp ch\u01b0\u01a1ng 1 (Ph\u1ea7n 3)"},"content":{"rendered":"

C\u00e2u 15:<\/b>\u00a0Cho h\u00ecnh thang c\u00e2n c\u00f3 c\u1ea1nh \u0111\u00e1y AB = a, c\u1ea1nh \u0111\u00e1y DC = 3a, g\u00f3c ADC = 45^{o<\/sup>. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD. Bi\u1ebft r\u1eb1ng SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y v\u00e0 SB t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 45^{o<\/sup><\/p>\n}}

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C\u00e2u 16:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh h\u1ed9p ABCD.A’B’C’D’ c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u1eb1ng a, c\u1ea1nh b\u00ean t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 60^{o<\/sup>\u00a0, h\u00ecnh chi\u1ebfu c\u1ee7a A\u2019 l\u00ean m\u1eb7t ph\u1eb3ng (ABCD) tr\u00f9ng v\u1edbi t\u00e2m c\u1ee7a ABCD.<\/p>\n}

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C\u00e2u 17:<\/b>\u00a0Cho h\u00ecnh h\u1ed9p ABCD.A’B’C’D’ c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u1eb1ng a, h\u00ecnh chi\u1ebfu c\u1ee7a A\u2019 l\u00ean m\u1eb7t ph\u1eb3ng (ABCD) tr\u00f9ng v\u1edbi t\u00e2m c\u1ee7a ABCD. G\u1ecdi M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AD. T\u00ednh kho\u1ea3ng c\u00e1ch h t\u1eeb M \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (A\u2019ABB\u2019), bi\u1ebft r\u1eb1ng th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh h\u1ed9p ABCD.A’B’C’D’ b\u1eb1ng 2a^{3<\/sup>\/3<\/p>\n}

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C\u00e2u 18:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a kh\u1ed1i l\u0103ng tr\u1ee5 ABC.A’B’C’, c\u00f3 A\u2019BC l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh b\u1eb1ng a, ABC l\u00e0 tam gi\u00e1c c\u00e2n t\u1ea1i A, h\u00ecnh chi\u1ebfu c\u1ee7a A\u2019 l\u00ean (ABC) tr\u00f9ng v\u1edbi trung \u0111i\u1ec3m c\u1ee7a BC, g\u00f3c gi\u1eefa A\u2019A v\u00e0 (ABC) b\u1eb1ng 30^{o<\/sup><\/p>\n}

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C\u00e2u 19:<\/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 (A\u2019BC) b\u1eb1ng a\u221a2\/2<\/p>\n

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C\u00e2u 20:<\/b>\u00a0Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u1eb1ng 6a, SAD l\u00e0 tam guacs c\u00e2n t\u1ea1i S, m\u1eb7t (SAD) vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y. Bi\u1ebft r\u1eb1ng th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p \u0111\u00e3 cho b\u1eb1ng 48a^{3<\/sup>\u00a0. T\u00ednh kho\u1ea3ng c\u00e1ch h t\u1eeb B \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (SDC)<\/p>\n}

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H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n\n\n\n
15-D<\/td>\n 16-D<\/td>\n 17-C<\/td>\n 18-B<\/td>\n 19-D<\/td>\n 20-D<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"
C\u00e2u 15:\u00a0Cho h\u00ecnh thang c\u00e2n c\u00f3 c\u1ea1nh \u0111\u00e1y AB = a, c\u1ea1nh \u0111\u00e1y DC = 3a, g\u00f3c ADC = 45o. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD. Bi\u1ebft r\u1eb1ng SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y v\u00e0 SB t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 45o C\u00e2u 16:\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh h\u1ed9p ABCD.A’B’C’D’ c\u00f3 \u0111\u00e1y […]<\/p>\n","protected":false},"author":3,"featured_media":28810,"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 - \u00d4n t\u1eadp ch\u01b0\u01a1ng 1 (Ph\u1ea7n 3)<\/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-on-tap-chuong-1-phan-3\/\" \/>\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 - \u00d4n t\u1eadp ch\u01b0\u01a1ng 1 (Ph\u1ea7n 3)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 15:\u00a0Cho h\u00ecnh thang c\u00e2n c\u00f3 c\u1ea1nh \u0111\u00e1y AB = a, c\u1ea1nh \u0111\u00e1y DC = 3a, g\u00f3c ADC = 45o. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD. 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