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Mik cần giải câu b nhé mong mn giúp Cho tam giác ABC vuông tại A (AB<AC) phân giác BE(E thuộc AC) .Lấy điểm H thuộc đường thẳng BC Sao cho BH= BA a) Chứng minh EH vuôg BC b) Chứng minh BE là đường trung trực của AH
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