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tritrinh992000
2 năm trước
cho tam giác ABC cân tại a kẻ BD vuông góc với AC và ck vuông góc với AB (H thuộc AC K thuộc AB) BH BH cắt CK tại E a) chứng minh AH = AK b) chứng minh AE là tia phân giác của góc BAC c) trên nửa mặt phẳng bờ BC không chứa điểm a lấy điểm m sao cho BM = MC chứng minh ba điểm A,E,M thằng hàng Làm nhanh giúp mình
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