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tieukimnguu2k3
2 năm trước
mấy bạn giỏi toán ới giúp mình toán 7 vớiiiiiiiiiiiiiiii.Hình dễ vẽ nhưng chứng minh khó :'( Cho tam giác ABC vuông cân ở A, M là trung điểm của BC, điểm E nằm giữa M và C . Kẻ BH, CK vuông góc với AE( H và K thuộc đường thẳng AE) . Chứng minh rằng a) BH = AK b) ∆MBH = ∆MAK c) Tam giác MHK là tam giác vuông cân
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