求证:AE=AF
1.AE=AF.求证CD/BD=CF/BE
在平行四边形ABCD中,AE⊥BC,AF⊥CD,AE=AF求证平行四边形ABCD是菱形
如图,已知AE⊥AD,AF⊥AB,AB//CD,AE=CD,AE=AD,AF=CD,求证AC=EF
等边三角形ABC,D为BC中点,E为AB上一点,做等边三角形EDF,连接AF,求证,AF=AE.
如图 已知AB=CD,AE=DF,CE=BF.求证:AF=DE
如图,已知AB=DC AE=DF .CE=BF 求证:AF=DE
已知如图AB=DC,AE=DF,CE=FB求证AF=DE
如图,已知AB=DC,AE=DF,CE=FB,求证AF=DE
如图所示,AB=AD,CB=CD,CE=CF.求证:AE=AF
AB=DC.AE=DF.CE=BF.求证:AF=DE.
AB=DC,AE=DF,CE=FB,求证AF=DE
如图,已知AB=DC,AE=DF,CE=BF,求证:AF=DE