Mathematics, 16.06.2021 18:30 elainestorm5676
Câu 3: Cho hình chóp S. ABC có đáy ABC là tam giác vuông tại B. Đường thẳng SA vuông góc mặt phẳng (ABC). a) vẽ hinh và chứng minh SA vuông góc BC b) Chứng minh BC vuông góc mặt phằng (SAB) c) Chứng minh mặt phănge (SAB) vuông góc mặt phẳng (ABC)
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Câu 3: Cho hình chóp S. ABC có đáy ABC là tam giác vuông tại B. Đường thẳng SA vuông góc mặt phẳng (...
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