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Mathematics, 21.07.2021 18:00 amoauya
Cho hình chóp S. ABCD có đáy ABC là tam giác vuông tại B, AB=b, BC=a^2, đường thẳng SA vuông góc với mặt phẳng đáy và góc đường thẳng SC và mặt phẳng đáy bằng 30 độ. Gọi h là khoảng cách từ điểm S đến mặt phẳng (ABC). Mệnh đề đúng?
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Cho hình chóp S. ABCD có đáy ABC là tam giác vuông tại B, AB=b, BC=a^2, đường thẳng SA vuông góc với...
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