\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2016 m\u00f4n To\u00e1n – S\u1edf GD B\u1eafc Ninh, c\u00e1c em tham kh\u1ea3o d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n
C\u00e2u III. (3,0 \u0111i\u1ec3m)<\/strong><\/p>\n Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 SA vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng (ABCD), SA = a, \u0111\u00e1y ABCD l\u00e0 h\u00ecnh thang vu\u00f4ng t\u1ea1i A v\u00e0 B v\u1edbi AB = BC = a, AD = 2a.<\/p>\n 1. Ch\u1ee9ng minh r\u1eb1ng SA \u22a5 BC, (SAC) \u22a5 (SCD)<\/p>\n 2. T\u00ednh kho\u1ea3ng c\u00e1ch t\u1eeb A \u0111\u1ebfn m\u1eb7t ph\u1eb3ng (SCD)<\/p>\n 3. T\u00ednh g\u00f3c gi\u1eefa hai m\u1eb7t ph\u1eb3ng (SBC) v\u00e0 (SCD)<\/p>\n II.\u00a0 Ph\u1ea7n Ri\u00eang (2,0 \u0111i\u1ec3m)<\/strong><\/p>\n B. Theo ch\u01b0\u01a1ng tr\u00ecnh n\u00e2ng cao<\/p>\n C\u00e2u 4.b. (1,5 \u0111i\u1ec3m)<\/strong><\/p>\n cho h\u00e0m s\u1ed1 \u00a0Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh y’=0<\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" \u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2016 m\u00f4n To\u00e1n – S\u1edf GD B\u1eafc Ninh, c\u00e1c em tham kh\u1ea3o d\u01b0\u1edbi \u0111\u00e2y: \u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2016 m\u00f4n To\u00e1n – S\u1edf GD B\u1eafc Ninh \u00a0 C\u00e2u III. (3,0 \u0111i\u1ec3m) Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 SA vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng (ABCD), […]<\/p>\n","protected":false},"author":2,"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":[171],"tags":[],"yoast_head":"\n