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coccoclagi
2 năm trước
Cho tam giác ABC vuông tại A. Tia phân giác của giác của góc ABC cắt tại AC tại D . Từ D kẻ DH vuông góc với BC tại A. Khi đó : A. AD=DH B.AD>DH C. AD<DH D. AD=DC
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