三角形ABC中,D为BC的中点,DE垂直于BC交角BAC的平分线AE于E,EF垂直于AB于F,EG垂直于AC交AC的延长线于G求证BF=CG
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RtAFEAGEFAEEAGAE=AEAFEAGEASARtEF=EGDEBCDDBCBECBE=CERtBFECGEEF=EGBE=CERtBFERtCGEASASASRtBF=CG...
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一三字为近义词的四字词语
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