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nguyenbe8nn
2 năm trước
Cho tam giác ABC vuông tại A,có AB<AC.Trên cạnh BC lấy điểm D sao cho AB =DB.Kẻ AH vuông góc với BC,kẻ DK vuông góc với AC . a/Chứng minh BAD =BDA. b/Chứng minh AD là tia phân giác của góc HAC. Mọi người ơi giúp mình với !
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