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hoangphonghp836
1 năm trước
Cho tam giác ABC vuông tại A có AB <AC .Kẻ tia phân giác của góc ABC cắt AC tại D .Kẻ DE vuông góc với BC tại E . Hai đường thẳng BA và ED cắt nhau tại H.CMR a) tam giác ABD = tam giác EBD b) tam giác ADH = tam giác EDC c) tam giác AHC = tam giác ECH d) tam giác BEH = tam giác BAC
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