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Mathematics, 18.06.2021 17:40 tthompson7186
Bài 1: Cho hình chóp S. ABCD có đáy ABCD là hình chữ nhật có AB = 2a ; AD = 3a , SA vuông góc với đáy và góc giã mặt phẳng ( D) và (ABCD) bằng 60 degrees . A) Tính góc giữa (SAC) và (SCD) b) Tính góc giữa (Sl ) và (SBC). C) Tính góc giữa (SB ) và (SCD) .
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Bài 1: Cho hình chóp S. ABCD có đáy ABCD là hình chữ nhật có AB = 2a ; AD = 3a , SA vuông góc với đá...
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