Mathematics, 02.08.2021 05:50 calraezaj2020
cho tam giác ABC vuông tại A. vẽ đường cao AH, lấy D thuộc AC. E là hình chiếu của A trên BD. CM:a, BE. BD=BH. BC b, góc BEH bằng góc C c. góc BAH=góc BEH
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cho tam giác ABC vuông tại A. vẽ đường cao AH, lấy D thuộc AC. E là hình chiếu của A trên BD. CM:a,...
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