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nhavy2203
2 năm trước
Cho ABC (AB<AC) có AM là phân giác góc A(M thuộc BC) Trên AC lấy điểm D sao choAD=AB a)c/m BM=MD b)Gọi K là giao điểm của AB và DM c)C/m tam giác DAK=tam giác BAC cC/m tam giác AKC cân d) so sánh BM và CM
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