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mianechanyeol
2 năm trước
Bài 2: Cho ABC cân tại A, đường cao AH. Trên tia AC lấy điểm M sao cho AC = CM. Kéo dài AH cắt BM tại E. a) Chứng minh rằng: HB = HC. b) Chứng minh rằng: EBC cân. c) Hai đường thẳng AB và CE cắt nhau tại K. Chứng minh rằng: E là trọng tâm của AKM . d) Chứng minh rằng: AM - AB = EM - EB .
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