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trankhanhan147
2 năm trước
Bài 1 a)cho tam giác abc ,m là trung điểm của BC ,D trên AC sao cho CD=2AD.AM cắt BD tại i.CM:I là trung điểm AM b)cho tam giác ABC có trung tuyến AM. Gọi E là trung điểm BI cắt ACtại D. CM:AD=1/2DC Bài 2 Cho tam giác ABC có trung tuyến BD vad CE.Gọi M và N lần lượt là trung điểm của BE và CD.MN cắt BD và CE thứ tự tại I và K a)Tính độ dài MN ok la làm đc gì thì làm nhưng cả 2 bài nha vote 5 sao yêu thích cố lên :)))
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