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Mathematics, 25.07.2021 23:00 jalst6084

Cho hình chóp SABCD có đáy ABCD là hình chữ nhật AB = a SA vuông góc với ABCD SC hợp với đáy một góc 30 độ và mặt bên SBC hợp với đáy một góc 45 độ

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Cho hình chóp SABCD có đáy ABCD là hình chữ nhật AB = a SA vuông góc với ABCD SC hợp với đáy một góc...

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