emaf-4电影下载

延长AE与DC的延长线交M,∵E是BC边的中点,BE=EC∴⊿AEB≌⊿MBC(ASA)∴MC=AB=CD,AE=EM∵AF／EF=3／1∴AF／AF+EF=3／4∴AF／EM=3／4∴AF=3／4EM∴EF=1／4EM∴FM=EF+EM=1／4EM+EM=5／4EMAF／FM=﹙...

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