C\u00e2u 7 ( 1 \u0111i\u1ec3m)<\/strong><\/p>\n Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u1eb1ng a, m\u1eb7t b\u00ean SBC l\u00e0 tam gi\u00e1c vu\u00f4ng t\u1ea1i S v\u00e0 n\u1eb1m trong m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng (ABCD), Cho bi\u1ebft g\u00f3c gi\u1eefa SB v\u00e0 m\u1eb7t ph\u1eb3ng (ABCD) b\u1eb1ng 300<\/sup>.<\/p>\n a) T\u00ednh theo a th\u1ec3 t\u00edch kh\u1ed1i ch\u00f3p S.ABCD<\/p>\n b) X\u00e1c \u0111\u1ecbnh v\u00e0 t\u00ednh theo a \u0111\u1ed9 d\u00e0i \u0111o\u1ea1n vu\u00f4ng g\u00f3c chung c\u1ee7a SA, DC<\/p>\n C\u00e2u 8 ( 1 \u0111i\u1ec3m)<\/strong><\/p>\n Trong m\u1eb7t ph\u1eb3ng (Oxy) tam gi\u00e1c ABC c\u00f3 \u0111\u1ec9nh J(2;3) t\u00e2m \u0111\u01b0\u1eddng tr\u00f2n ngo\u1ea1i ti\u1ebfp I(1;6) v\u00e0 t\u00e2m \u0111\u01b0\u1eddng tr\u00f2n n\u1ed9i ti\u1ebfp J(4;5). Vi\u1ebft ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng th\u1eb3ng AB.<\/p>\n <\/p>\n Tuyensinh247.com<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" \u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n To\u00e1n c\u1ee7a S\u1edf GD Kh\u00e1nh H\u00f2a n\u0103m 2016,\u00a0c\u00e1c em theo d\u00f5i chi ti\u1ebft b\u00ean d\u01b0\u1edbi: C\u00e2u 7 ( 1 \u0111i\u1ec3m) Cho h\u00ecnh ch\u00f3p S.ABCD c\u00f3 \u0111\u00e1y ABCD l\u00e0 h\u00ecnh vu\u00f4ng c\u1ea1nh b\u1eb1ng a, m\u1eb7t b\u00ean SBC l\u00e0 tam gi\u00e1c vu\u00f4ng t\u1ea1i S v\u00e0 n\u1eb1m trong m\u1eb7t ph\u1eb3ng vu\u00f4ng g\u00f3c v\u1edbi […]<\/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":[28],"tags":[],"yoast_head":"\n