Mathematics, 22.06.2021 01:00 BriP5022

Cho hình chóp SBCDA có đáy ABCD là hình vuông cạnh a , mặt bên (SAD) vuông góc vs (SAD) và SAD là tam giác đều . M là trung điểm của AD . Tính góc giữa (SAB) với (ABCD)

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Cho hình chóp SBCDA có đáy ABCD là hình vuông cạnh a , mặt bên (SAD) vuông góc vs (SAD) và SAD là ta...

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