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sonnhat1979
2 năm trước
Cho Tam giác ABC vuông tại A có đường cao AH.Trên cạnh BC lấy điểm M sao cho CM=CA.Trên cạnh AB lấy điểm N sao cho AN=AH. chứng minh: a. Góc CAM= góc CMA b. Góc CMA và góc MÀN phụ nhau C. AM là tia phân giác của góc BAH d.MN vuông với AB
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