已知:如图,AB,CD交于O点,CE‖DF,CE=DF,AE∥BF.求证:∠ACE=∠BDF.
已知:如图,AB,CD交于O点,CE‖DF,CE=DF,AE∥BF.求证:∠ACE=∠BDF.
数学题 速度在线等 已知:如图,AE=BF,AD∥BC,AB、CD交于O点.求证:CE=DF.
已知:如图,AB,CD相交于点O,AC‖DB,OC=OD,E,F为AB上两点,且AE=BF,求证:CE//DF
已知:如图,AB、CD相交于点O,AC‖DB,OC=OD,E、F为AB上两点,且AE=BF,求证:CE//DF.
如图,已知AB=CD,AE⊥BC于点E,DF⊥BC于点F,CE=BF连接AD,交EF于点O,求证:点O是线段AD中点
如图,已知,AB=CD,AE⊥BC于E点,DF⊥BC于F,AE=DF,求证CE=BF
已知:如图,AD=CD CE=BF DF=AE 求证AB‖DC
已知;AB为圆O的直径,CD为弦,CE⊥CD交AB于E DF⊥CD交AB于F求证;AE=BF
如图,AB=CD,AE=DF,CE=BF,求证AE平行DF
如图,AB=CD,AE=DF,CE=BF,求证:AE平行DF
如图,AB=CD,AE⊥BC于E,DF⊥BC于F,AD交EF于O,OA=OD,求证:BF=CE
已知:如图,AB为⊙O的直径,CD为弦,CE⊥CD交AB于E,DF⊥CD交AB于F,求证:AE=BF