Mathematics, 25.07.2021 07:20 marianesabrinap20

cho hình chóp S. ABCD có đáy ABCD là hình vuông tâm O, cạnh a, SA vuông góc với mặt đáy và SA=3A. Gọi M, N lần lượt là trung điểm của SC, SD. Thể tích khối tứ diện SOMN là

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cho hình chóp S. ABCD có đáy ABCD là hình vuông tâm O, cạnh a, SA vuông góc với mặt đáy và SA=3A. Gọ...

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