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phamvietnamhaicntt13
2 năm trước
cho hình vẽ bên biết A4 = B1 a.hỏi a và b có song song không? vì sao b. trên hình vẽ đã cho :Vẽ tia phân giác góc A4 cắt đường thẳng b tại C, vẽ tia phân giác B1 cắt đường thẳng a tại D chứng minh AC//BD
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