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Đang tải... (xem toàn văn)
Cho hình chóp S.ABC có đáy là tam giác đều cạnh a, mặt bên SAB là tam giác vuông cân tại S và nằm trong mặt phẳng vuông góc với đáy.. Tính diện tích của mặt cầu ngoại tiếp hình chóp S.AB[r]
[Đáp án] đề thi học kỳ 1 Toán 12 THPT Lương Thế Vinh – Hà Nội 2019
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