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phuongxuan2906
2 năm trước
Cho tam giác ABC vuông tại A .Kẻ phân giác BD (D thuộc Ac).Kẻ DE vuông góc BC tại E. a)Chứng minh AB=BE b)Chứng minh AE vuông góc BD c) Gọi K là giao điểm tia ED vsf BA Chứng minh rằng :BD vuông góc Kc Các cao nhân giúp em với ạ , E cần gấp á=((
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