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bivamoon2017
2 năm trước
Mong mn giúp mình nhé:) Cho tam giác ABC vuông tại A có AB=3cm, BC=5cm.Vẽ 2 đường trung tuyến AN và CM, trên tia AN lấy D sao cho N là trung điểm của AD. a) MD cắt BC tại H, gọi I là trung điểm của AC, DI cắt BC tại K. Ch/m tam giác HBD = tam giác KCA.
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