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janson_pro
2 năm trước
Cho tam giác ABC vuông tại A (AB<AC). Trên cạnh BC lấy điểm M sao cho BA=BM. kẻ tia phân giác BI(I thuộc AC) A)chứng minh IM vuông góc với BC b)tia MI cắt AB tại K .chứng minh IK=IC,BK=BC,AK=MC
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