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phuonghuong
2 năm trước
Bài 5: Cho tam giác ABC có AB = 5cm, Ac = 12cm, BC = 13cm. a) Tam giác ABC là tam giác gì? b) Gọi I là trung điểm của đoạn AB. Vẽ AH vuông góc với đoạn CI tại H, vẽ BK vuông góc với đường thẳng CI tại K. Chứng minh AH = BK c) Từ I vẽ đường thẳng vuông góc với AB và cắt BC tại M. Chứng minh tam giác BMA là tam giác cân Giúp mình với mình đang cần gấp
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