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{"id":28962,"date":"2018-04-27T17:31:57","date_gmt":"2018-04-27T10:31:57","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=28962"},"modified":"2018-04-27T17:31:57","modified_gmt":"2018-04-27T10:31:57","slug":"bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-bai-1-khai-niem-ve-khoi-da-dien-phan-2","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-bai-1-khai-niem-ve-khoi-da-dien-phan-2\/","title":{"rendered":"B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m H\u00ecnh h\u1ecdc 12 \u2013 Ch\u01b0\u01a1ng 1 – B\u00e0i 1: Kh\u00e1i ni\u1ec7m v\u1ec1 kh\u1ed1i \u0111a di\u1ec7n (Ph\u1ea7n 2)"},"content":{"rendered":"

C\u00e2u 7:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

A. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 8 c\u1ea1nh<\/p>\n

B. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 7 c\u1ea1nh<\/p>\n

C. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 6 c\u1ea1nh<\/p>\n

D. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 9 c\u1ea1nh<\/p>\n

C\u00e2u 8:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

A. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 8 \u0111\u1ec9nh<\/p>\n

B. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 6 \u0111\u1ec9nh<\/p>\n

C. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 5 \u0111\u1ec9nh<\/p>\n

D. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 4 \u0111\u1ec9nh<\/p>\n

C\u00e2u 9:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

A. T\u1ed3n t\u1ea1i m\u1ed9t h\u00ecnh \u0111a di\u1ec7n c\u00f3 s\u1ed1 m\u1eb7t l\u1edbn h\u01a1n s\u1ed1 c\u1ea1nh<\/p>\n

B. T\u1ed3n t\u1ea1i m\u1ed9t h\u00ecnh \u0111a di\u1ec7n c\u00f3 s\u1ed1 m\u1eb7t l\u1edbn h\u01a1n s\u1ed1 \u0111\u1ec9nh<\/p>\n

C. Trong m\u1ed9t h\u00ecnh \u0111a di\u1ec7n s\u1ed1 m\u1eb7t lu\u00f4n l\u1edbn h\u01a1n ho\u1eb7c b\u1eb1ng s\u1ed1 \u0111\u1ec9nh<\/p>\n

D. T\u1ed3n t\u1ea1i m\u1ed9t h\u00ecnh \u0111a di\u1ec7n c\u00f3 s\u1ed1 \u0111\u1ec9nh l\u1edbn h\u01a1n s\u1ed1 c\u1ea1nh<\/p>\n

C\u00e2u 10:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

A. Trong m\u1ed9t h\u00ecnh \u0111a di\u1ec7n n\u1ebfu s\u1ed1 m\u1eb7t v\u00e0 s\u1ed1 \u0111\u1ec9nh l\u1ebb th\u00ec s\u1ed1 c\u1ea1nh ch\u1eb5n<\/p>\n

B. Trong m\u1ed9t h\u00ecnh \u0111a di\u1ec7n n\u1ebfu s\u1ed1 m\u1eb7t v\u00e0 s\u1ed1 \u0111\u1ec9nh l\u1ebb th\u00ec s\u1ed1 c\u1ea1nh l\u1ebb<\/p>\n

C. Trong m\u1ed9t h\u00ecnh \u0111a di\u1ec7n n\u1ebfu s\u1ed1 m\u1eb7t v\u00e0 s\u1ed1 c\u1ea1nh l\u1ebb th\u00ec s\u1ed1 \u0111\u1ec9nh l\u1ebb<\/p>\n

D. Trong m\u1ed9t h\u00ecnh \u0111a di\u1ec7n n\u1ebfu s\u1ed1 \u0111\u1ec9nh v\u00e0 s\u1ed1 c\u1ea1nh l\u1ebb th\u00ec s\u1ed1 m\u1eb7t l\u1ebb<\/p>\n

C\u00e2u 11:<\/b>\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang?<\/p>\n

Cho h\u00ecnh \u0111a di\u1ec7n (H) c\u00f3 c\u00e1c m\u1eb7t l\u00e0 nh\u1ee9ng tam gi\u00e1c, m\u1ed7i \u0111\u1ec9nh l\u00e0 \u0111\u1ec9nh chung c\u1ee7a \u0111\u00fang 3 m\u1eb7t. G\u1ecdi s\u1ed1 c\u00e1c \u0111\u1ec9nh, c\u1ea1nh, m\u1eb7t c\u1ee7a h\u00ecnh \u0111a di\u1ec7n (H) l\u1ea7n l\u01b0\u1ee3t l\u00e0 d, c, m. Khi \u0111\u00f3:<\/p>\n

A. d > m\u00a0\u00a0\u00a0B. d < m\u00a0\u00a0\u00a0C. d = m\u00a0\u00a0\u00a0D. d + m = c<\/p>\n

C\u00e2u 12:<\/b>\u00a0M\u1ed7i \u0111\u1ec9nh c\u1ee7a h\u00ecnh \u0111a di\u1ec7n l\u00e0 \u0111\u1ec9nh chung c\u1ee7a \u00edt nh\u1ea5t bao nhi\u00eau m\u1eb7t?<\/p>\n

A. 2 m\u1eb7t\u00a0\u00a0\u00a0B. 3 m\u1eb7t\u00a0\u00a0\u00a0C. 4 m\u1eb7t\u00a0\u00a0\u00a0D. 5 m\u1eb7t<\/p>\n

H\u01b0\u1edbng d\u1eabn gi\u1ea3i v\u00e0 \u0110\u00e1p \u00e1n<\/b><\/p>\n\n\n\n
7-C<\/td>\n8-D<\/td>\n9-B<\/td>\n10-A<\/td>\n11-C<\/td>\n12-B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e2u 9:<\/b><\/p>\n

C\u00e1ch 1. D\u00f9ng c\u00f4ng th\u1ee9c (1)<\/p>\n

C\u00e1ch 2. T\u1eeb h\u00ecnh b\u00e1t di\u1ec7n \u0111\u1ec1u suy ra B l\u00e0 m\u1ec7nh \u0111\u1ec1 \u0111\u00fang<\/p>\n

C\u00e1ch 3. C\u0169ng c\u00f3 th\u1ec3 d\u00f9ng c\u00f4ng th\u1ee9c (2) v\u00e0 (3) nh\u01b0 sau: V\u00ec m\u1ed7i m\u1eb7t c\u00f3 \u00edt nh\u1ea5t ba c\u1ea1nh, n\u00ean theo (2) ta c\u00f3 2c \u2265 3m , suy ra c > m . Do \u0111\u00f3 m\u1ec7nh \u0111\u1ec1 A sai. T\u01b0\u01a1ng t\u1ef1 t\u1eeb (3) suy ra m\u1ec7nh \u0111\u1ec1 D sai. T\u1eeb h\u00ecnh t\u1ee9 di\u1ec7n suy ra C sai. V\u1eady B l\u00e0 m\u1ec7nh \u0111\u1ec1 \u0111\u00fang.<\/p>\n

C\u00e2u 10:<\/b><\/p>\n

D\u00f9ng c\u00f4ng th\u1ee9c \u01a0le.<\/p>\n

C\u00e2u 11:<\/b><\/p>\n

Ta c\u00f3 3d = 3m = 2c, suy ra C \u0111\u00fang<\/p>\n

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

C\u00e2u 7:\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang? A. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 8 c\u1ea1nh B. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 7 c\u1ea1nh C. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 6 c\u1ea1nh D. M\u1ed7i h\u00ecnh \u0111a di\u1ec7n c\u00f3 \u00edt nh\u1ea5t 9 c\u1ea1nh C\u00e2u 8:\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 […]<\/p>\n","protected":false},"author":3,"featured_media":0,"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 1: Kh\u00e1i ni\u1ec7m v\u1ec1 kh\u1ed1i \u0111a di\u1ec7n (Ph\u1ea7n 2)<\/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-1-khai-niem-ve-khoi-da-dien-phan-2\/\" \/>\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 1: Kh\u00e1i ni\u1ec7m v\u1ec1 kh\u1ed1i \u0111a di\u1ec7n (Ph\u1ea7n 2)\" \/>\n<meta property=\"og:description\" content=\"C\u00e2u 7:\u00a0Trong c\u00e1c m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 n\u00e0o \u0111\u00fang? 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