Mathematics, 24.07.2021 01:00 shayleewright

Cho hình lăng trụ đứng ABC. A'B'C' có đáy là tam giác ABC vuông góc tại B với AB=a, BC=a căn 3. Biết AA'=2a a) tính góc giữa ABC và A'BC b) tính khoảng cách từ A đến ( A'BC)

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Cho hình lăng trụ đứng ABC. A'B'C' có đáy là tam giác ABC vuông góc tại B với AB=a, BC=a căn 3. Biết...

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