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hoangsonup
2 năm trước
Mọi người cho em hỏi tại sao lời giải bài này nó ghi d(C;BMO) = d(C;BMD) = 2d(S; BMD) Và cái việc kẻ CH vuông OM thì CH lại chính là kc (C;BMD) Đề: Cho hình chóp S.ABCD với đáy là hình thoi, O là giao điểm 2 đường chéo, SO vuông mpđ. Cho SO = 2√2, AC = 4, M tđ SC. Tính d(S;BMO)
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