phiphi0968246792 phiphi0968246792
  • 25-04-2024
  • Mathematics
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Bài 74. Cho hình chóp S.ABCD có đáy ABCD là hình vuông cạnh a, mặt bên SAD là tam giác đều và năm trong mặt phẳng vuông góc với mặt đáy. Gọi H là trung điểm cạnh AD. Tính khoảng cách từ điểm B đến mặt phẳng (SHC).

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