\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2015 m\u00f4n To\u00e1n \u2013 THPT G\u00e0nh H\u00e0o t\u1ec9nh B\u1ea1c Li\u00eau c\u00e1c em theo d\u00f5i chi ti\u1ebft b\u00ean d\u01b0\u1edbi:<\/p>\n
C\u00e2u 5<\/strong>( 3,0 \u0111i\u1ec3m<\/em>):Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh 2a. Tam gi\u00e1c SAB l\u00e0 tam gi\u00e1c \u0111\u1ec1u v\u00e0 m\u1eb7t ph\u1eb3ng ( SAB) vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng (ABCD). G\u1ecdi I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AB<\/p>\n a) Ch\u1ee9ng minh SI vu\u00f4ng g\u00f3c v\u1edbi (ABCD)<\/p>\n b) Ch\u1ee9ng minh (SAD) vu\u00f4ng g\u00f3c v\u1edbi (SAB)<\/p>\n c) T\u00ednh g\u00f3c gi\u1eefa AB v\u00e0 SC<\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" \u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2015 m\u00f4n To\u00e1n \u2013 THPT G\u00e0nh H\u00e0o t\u1ec9nh B\u1ea1c Li\u00eau c\u00e1c em theo d\u00f5i chi ti\u1ebft b\u00ean d\u01b0\u1edbi: \u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2015 m\u00f4n To\u00e1n \u2013 THPT G\u00e0nh H\u00e0o C\u00e2u 5( 3,0 \u0111i\u1ec3m):Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh […]<\/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\u0110\u00e1p \u00e1n \u0111\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2015 m\u00f4n To\u00e1n \u2013 THPT G\u00e0nh H\u00e0o<\/strong><\/h4>\n