\u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2015 m\u00f4n To\u00e1n – S\u1edf GD Nam \u0110\u1ecbnh, c\u00e1c em tham kh\u1ea3o \u0111\u1ec1 thi d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n
C\u00e2u 3 (2,0 \u0111i\u1ec3m)<\/strong><\/p>\n C\u00e2u 4 (3,0 \u0111i\u1ec3m):<\/strong>\u00a0Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u00ean SA cu\u00f4ng g\u00f3c \u0111\u00e1y ABCD, g\u00f3c gi\u1eefa \u0111\u01b0\u1eddng th\u1eb3ng SC v\u00e0 m\u1eb7t ph\u1eb3ng (ABCD) b\u1eb1ng 450<\/sup>. G\u1ecdi H, K l\u1ea7n l\u01b0\u1ee3t l\u00e0 h\u00ecnh chi\u1ebfu vu\u00f4ng g\u00f3c c\u1ee7a A l\u00ean c\u00e1c \u0111\u01b0\u1eddng th\u1eb3ng SB v\u00e0 SC.<\/p>\n 1. Ch\u1ee9ng minh AH \u22a5 mp(SBC)<\/p>\n 2. T\u00ednh cosin c\u1ee7a g\u00f3c gi\u1eefa \u0111\u01b0\u1eddng th\u1eb3ng SD v\u00e0 m\u1eb7t ph\u1eb3ng (AKH)<\/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 – S\u1edf GD Nam \u0110\u1ecbnh, c\u00e1c em tham kh\u1ea3o \u0111\u1ec1 thi d\u01b0\u1edbi \u0111\u00e2y: \u0110\u1ec1 thi h\u1ecdc k\u00ec 2 l\u1edbp 11 n\u0103m 2015 m\u00f4n To\u00e1n – S\u1edf GD Nam \u0110\u1ecbnh C\u00e2u 3 (2,0 \u0111i\u1ec3m) Gi\u1ea3i ph\u01b0\u01a1ng tr\u00ecnh:\u00a0 T\u00ecm cac s\u1ed1 nguy\u00ean d\u01b0\u01a1ng n sao cho […]<\/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\n