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sunyeu2001
2 năm trước
Cho tam giác ABC có cạnh AB = 12cm, AC = 16cm, BC = 20cm. Kẻ đường cao AM. Kẻ ME vuông góc với AB. e) Chứng minh tam giác ABC là tam giác vuông. f) Tính độ dài AM, BM. g) Chứng minh AE.AB = AC? - MC?. h) Chứng minh AE. AB = MB. MC = EM. AC.
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