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thuygiangloga
2 năm trước
Cho tam giác ABC vuông tại A, trên cạnh BC lấy điểm K sao cho BK = BA, qua K kẻ đường thẳng vuông góc với BC cắt AC tại E và cắt AB tại M a, C/m tam giác ABE = tam giác KBE, BE là tia phân giác góc ABC b, Tam giác BKM = tam giác BAC và AK //MC c, So sánh AE và CE
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