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 -L\u00fd thuy\u1ebft<\/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-ly-thuyet\/\" \/>\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 -L\u00fd thuy\u1ebft\" \/>\n<meta property=\"og:description\" content=\"1. 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{"id":28972,"date":"2018-04-27T17:34:49","date_gmt":"2018-04-27T10:34:49","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=28972"},"modified":"2018-04-27T17:34:49","modified_gmt":"2018-04-27T10:34:49","slug":"bai-tap-trac-nghiem-hinh-hoc-12-chuong-1-bai-1-khai-niem-ve-khoi-da-dien-ly-thuyet","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-ly-thuyet\/","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 -L\u00fd thuy\u1ebft"},"content":{"rendered":"

1.<\/b> H\u00ecnh \u0111a di\u1ec7n (g\u1ecdi t\u1eaft l\u00e0 \u0111a di\u1ec7n) l\u00e0 h\u00ecnh t\u1ea1o b\u1edfi m\u1ed9t s\u1ed1 h\u1eefu h\u1ea1n c\u00e1c \u0111a gi\u00e1c th\u1ecfa m\u00e3n hai t\u00ednh ch\u1ea5t:<\/p>\n

a) Hai \u0111a gi\u00e1c ph\u00e2n bi\u1ec7t ch\u1ec9 c\u00f3 th\u1ec3 ho\u1eb7c kh\u00f4ng c\u00f3 \u0111i\u1ec3m chung, ho\u1eb7c ch\u1ec9 c\u00f3 m\u1ed9t \u0111\u1ec9nh chung, ho\u1eb7c ch\u1ec9 c\u00f3 m\u1ed9t c\u1ea1nh chung.<\/p>\n

b) M\u1ed7i c\u1ea1nh c\u1ee7a \u0111a gi\u00e1c n\u00e0o c\u0169ng l\u00e0 c\u1ea1nh chung c\u1ee7a \u0111\u00fang hai \u0111a gi\u00e1c.<\/p>\n

2.<\/b> Kh\u1ed1i \u0111a di\u1ec7n l\u00e0 ph\u1ea7n kh\u00f4ng gian \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n b\u1edfi m\u1ed9t h\u00ecnh \u0111a di\u1ec7n, k\u1ec3 c\u1ea3 h\u00ecnh \u0111a di\u1ec7n \u1ea5y.<\/p>\n

3.<\/b> Ph\u00e9p bi\u1ebfn h\u00ecnh trong kh\u00f4ng gian \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u00e9p d\u1eddi h\u00ecnh n\u1ebfu n\u00f3 b\u1ea3o t\u1ed3n kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111i\u1ec3m t\u00f9y \u00fd. V\u00ed d\u1ee5: Trong kh\u00f4ng gian c\u00e1c ph\u00e9p t\u1ecbnh ti\u1ebfn, ph\u00e9p \u0111\u1ed1i x\u1ee9ng qua m\u1ed9t m\u1eb7t ph\u1eb3ng, ph\u00e9p \u0111\u1ed1i x\u1ee9ng qua t\u00e2m, ph\u00e9p \u0111\u1ed1i x\u1ee9ng qua m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng l\u00e0 nh\u1eefng ph\u00e9p d\u1eddi h\u00ecnh.<\/p>\n

4.<\/b> Hai \u0111a di\u1ec7n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u1eb1ng nhau n\u1ebfu c\u00f3 m\u1ed9t ph\u00e9p d\u1eddi h\u00ecnh bi\u1ebfn \u0111a di\u1ec7n n\u00e0y th\u00e0nh \u0111a di\u1ec7n kia.<\/p>\n

5.<\/b> Nh\u1eadn x\u00e9t<\/p>\n

G\u1ecdi m, c, d theo th\u1ee9 t\u1ef1 l\u00e0 s\u1ed1 m\u1eb7t, s\u1ed1 c\u1ea1nh, s\u1ed1 \u0111\u1ec9nh c\u1ee7a \u0111a di\u1ec7n (H).<\/p>\n

a) Ta lu\u00f4n c\u00f3 m, d \u2265 4; c \u2265 6 ; m < c; d < c\u00a0\u00a0\u00a0(1)<\/p>\n

b) N\u1ebfu m\u1ed7i m\u1eb7t c\u1ee7a \u0111a di\u1ec7n (H) l\u00e0 \u0111a gi\u00e1c c\u00f3 \u0111\u00fang p c\u1ea1nh th\u00ec ta c\u00f3: mp = 2c \u00a0\u00a0\u00a0(2)<\/p>\n

c) N\u1ebfu m\u1ed7i \u0111\u1ec9nh c\u1ee7a \u0111a di\u1ec7n (H) l\u00e0 \u0111\u1ec9nh chung c\u1ee7a \u0111\u00fang q m\u1eb7t th\u00ec ta c\u00f3: dq = 2c\u00a0\u00a0\u00a0(3)<\/p>\n

d) C\u00f4ng th\u1ee9c \u01a0le: d + m – c = 2 \u00a0\u00a0\u00a0 (4)<\/p>\n

C\u00f4ng th\u1ee9c n\u00e0y kh\u00f4ng \u0111\u01b0\u1ee3c d\u1ea1y \u1edf l\u1edbp 12 nh\u01b0ng d\u1ec5 nh\u1edb v\u00e0 gi\u00fap ta gi\u1ea3i nhanh m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn s\u1ed1 \u0111\u1ec9nh, c\u1ea1nh, m\u1eb7t c\u1ee7a m\u1ed9t h\u00ecnh \u0111a di\u1ec7n.<\/p>\n","protected":false},"excerpt":{"rendered":"

1. H\u00ecnh \u0111a di\u1ec7n (g\u1ecdi t\u1eaft l\u00e0 \u0111a di\u1ec7n) l\u00e0 h\u00ecnh t\u1ea1o b\u1edfi m\u1ed9t s\u1ed1 h\u1eefu h\u1ea1n c\u00e1c \u0111a gi\u00e1c th\u1ecfa m\u00e3n hai t\u00ednh ch\u1ea5t: a) Hai \u0111a gi\u00e1c ph\u00e2n bi\u1ec7t ch\u1ec9 c\u00f3 th\u1ec3 ho\u1eb7c kh\u00f4ng c\u00f3 \u0111i\u1ec3m chung, ho\u1eb7c ch\u1ec9 c\u00f3 m\u1ed9t \u0111\u1ec9nh chung, ho\u1eb7c ch\u1ec9 c\u00f3 m\u1ed9t c\u1ea1nh chung. b) M\u1ed7i c\u1ea1nh c\u1ee7a […]<\/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 -L\u00fd thuy\u1ebft<\/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-ly-thuyet\/\" \/>\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 -L\u00fd thuy\u1ebft\" \/>\n<meta property=\"og:description\" content=\"1. 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