Mathematics, 26.07.2021 17:00 robert7248

Cho hình thang ABCD (AD//BC, AD>BC) có đường chéo AC vuông góc với cạnh bên CD , góc BAC= góc CAD, góc D= 60 độ

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Cho hình thang ABCD (AD//BC, AD>BC) có đường chéo AC vuông góc với cạnh bên CD , góc BAC= góc CAD...