已知AB=CD,BE=DF,∠ABE=∠CDF,求证AE∥CF

如图所示,已知AB=CD,BE=DF,△ABE全等于△CDF,求证;AB平行CD,AE平行CF 如图已知AB‖CD,AE∥∠DF,求证∠BAE=∠CDF 如图,已知AB‖CD,AE‖DF,求证∠BAE=∠CDF 已知AB∥CD且AB=CD,E、F是AC上的两点,AE=CF.式说明△ABE全等于△CDF,BE∥DF 如图,AB=DC,DE=BF,AE=CF 求证 (1)∠ABE=∠CDF (2)AB//CD (3) AD=BC 急求 已知：如图,点E,F在平行四边形ABCD的对角线BD上,且BE=DF,求证：△ABE≌△CDF（2）AE平行CF 如图,已知ABⅡCD,OA=OD,AE=DF,求证：BEⅡCF. 已知BC,EF交点O,AB//CD,OA=OD,AE=DF,求证BE//CF 已知：如图,AB//CD,角BAE+角CDF=180度.求证：AE//DF. 如图,已知AB//CD,BE//DF,AF=CE,说明:(1)△ABE≌△CDF(2)∠EBF=∠FDE 如图,已知AE=CF,AD=BC,AB=CD,DF=BE.求证:(1)∠E=∠F;(2)∠1=∠2. 如图,已知AE=CF,AD=BC,AB=CD,DF=BE.求证：∠1=∠2