C\u00e2u 1:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

A. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh \u0111a di\u1ec7n lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 ch\u1eb5n<\/p>\n

B. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh \u0111a di\u1ec7n lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 l\u1ebb<\/p>\n

C. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh ch\u00f3p lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 ch\u1eb5n<\/p>\n

D. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh ch\u00f3p lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 l\u1ebb<\/p>\n

C\u00e2u 2:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y, m\u1ec7nh \u0111\u1ec1 n\u00e0o sai?<\/p>\n

A. T\u1ed3n t\u1ea1i c\u00e1c kh\u1ed1i \u0111a di\u1ec7n \u0111\u1ec1u lo\u1ea1i (3;4)<\/p>\n

B. T\u1ed3n t\u1ea1i c\u00e1c kh\u1ed1i \u0111a di\u1ec7n \u0111\u1ec1u lo\u1ea1i (4;3)<\/p>\n

C. T\u1ed3n t\u1ea1i c\u00e1c kh\u1ed1i \u0111a di\u1ec7n \u0111\u1ec1u lo\u1ea1i (3;5)<\/p>\n

D. T\u1ed3n t\u1ea1i c\u00e1c kh\u1ed1i \u0111a di\u1ec7n \u0111\u1ec1u lo\u1ea1i (4;5)<\/p>\n

C\u00e2u 3:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh a, SCD l\u00e0 tam gi\u00e1c \u0111\u1ec1u v\u00e0 (SCD) vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y.<\/p>\n

<\/p>\n

C\u00e2u 4:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a h\u00ecnh ch\u00f3p tam gi\u00e1c \u0111\u1ec1u S.ABC c\u00f3 c\u1ea1nh \u0111\u00e1y b\u1eb1ng a. C\u1ea1nh b\u00ean SA t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 45^{o<\/sup><\/p>\n}

<\/p>\n

C\u00e2u 5:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh ch\u00f3p S.ABC c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh a, SA vu\u00f4ng g\u00f3c v\u1edbi \u0111\u00e1y, m\u1eb7t ph\u1eb3ng (SBC) t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c 45^{o<\/sup><\/p>\n}

<\/p>\n

C\u00e2u 6:<\/b>\u00a0T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a kh\u1ed1i ch\u00f3p t\u1ee9 gi\u00e1c \u0111\u1ec1u c\u1ea1nh \u0111\u00e1y a, c\u1ea1nh b\u00ean b\u1eb1ng<\/p>\n

<\/p>\n

C\u00e2u 7:<\/b>\u00a0Cho kh\u1ed1i l\u0103ng tr\u1ee5 ANC.A’B’C’ c\u00f3 \u0111\u00e1y l\u00e0 tam gi\u00e1c \u0111\u1ec1u c\u1ea1nh a, h\u00ecnh chi\u1ebfu c\u1ee7a A\u2019 l\u00ean m\u1eb7t ph\u1eb3ng (ABC) tr\u00f9ng v\u1edbi trung \u0111i\u1ec3m c\u1ea1nh AB, c\u1ea1nh b\u00ean A\u2019A t\u1ea1o v\u1edbi \u0111\u00e1y m\u1ed9t g\u00f3c b\u1eb1ng 45^{o<\/sup>\u00a0. T\u00ednh th\u1ec3 t\u00edch V c\u1ee7a kh\u1ed1i l\u0103ng tr\u1ee5 \u0111\u00f3.<\/p>\n}

<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n\n\n\n

1-C<\/td>\n

2-D<\/td>\n

3-B<\/td>\n

4-A<\/td>\n

5-C<\/td>\n

6-D<\/td>\n

7-C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":" C\u00e2u 1:\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau \u0111\u00e2y, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang? A. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh \u0111a di\u1ec7n lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 ch\u1eb5n B. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh \u0111a di\u1ec7n lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 l\u1ebb C. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh ch\u00f3p lu\u00f4n l\u00e0 m\u1ed9t s\u1ed1 ch\u1eb5n D. S\u1ed1 c\u1ea1nh c\u1ee7a m\u1ed9t h\u00ecnh […]<\/p>\n","protected":false},"author":3,"featured_media":28803,"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