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Haianh0511
2 năm trước
Cho tam giác ABC vuông tại A trên tia đối của tia AB lấy điểm K sao cho BK bằng BC vẽ KH vuông góc với BC tại H và cắt AB tại E a, vẽ hình và ghi GT -KL ? b, KH bằng AC? c, BE là tia phân giác của góc ABC? d, AE < EC?
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