如图AB=CD,BE=CF,AE=DF求证OA=OD
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如图,已知BE=DF,AE=CF,AE∥CF,说明AB∥CD
如图CD=AB,DF=BE,AE=CF,求证:DF//BE
如图,已知:BE=DF,AE=CF,AE平行CF.说明AB平行CD的理由
如图AB=CD,BE=CF,AE=DF求证OA=OD
如图,AB=CD,BE=DF,AE=CF,求证:EO=FO?
如图,AE=DF,CE=BF,AB=CD,证明BE平行CF
如图,已知AB平行CD,AD平行BC,AE=CF,说明BE=DF.
已知如图AB=CD AE=CF BE=DF请证明AB∥CD
如图,DE垂直AB于E,DF垂直AC于F,若BD=CD,BE=CF,求AB+AC与AE之间的等量关系
如图,已知ABⅡCD,OA=OD,AE=DF,求证:BEⅡCF.注:平行=Ⅱ
1.已知,如图 AE垂直BD,CF垂直BD,AB=CD,BE=DF.求证AD平行CB
如图,在⊙O中,弦AB‖弦CD,弦AE‖弦CF,求证:BE=DF
如图 已知:ab∥cd ae⊥bd于e,cf⊥bd于f,be=df.说明ae=cd的理由.
已知AB=CD,BE=DF,AE=CF,问AB‖CD吗
已知:如图,AB=CD,BC=DA,AE=CF.求证:DF=DE
已知AB=CD,AE=CF,BF=DE,说明:(1)BE=DF (2)BE//DF
已知:AB=CD,AE=CF,BF=DE,说明①BE=DF,②BE平行DF
已知AB=CD,AE=CF,BF=DE,说明:(1)BE=DF (2)BE//DF