如图,已知AF‖CD∠BAF=∠CDE∠ABC=∠DEF求证AB‖DE,BC‖EF急急急,1小时之内,

如图,已知AF‖CD∠BAF=∠CDE∠ABC=∠DEF求证AB‖DE,BC‖EF急急急,1小时之内, 如图,已知AF//CD,∠BAF=∠CDE,∠ABC=∠DEF,求证BC//EF 已知：如图,AB∥CD,∠BAF=∠F,∠CDE=∠E．求证：AF⊥DE． 如图,已知∠A=∠D,AB=DE,AF=CD,BC=EF. 求证:BC‖EF 已知：如图,AB=DE,BC=EF,AF=CD,求证∠A=∠D 如图△ABC中,DE‖BC,EF‖CD,求证AD^2=AF·AB. 已知,如图AB//DE BC//EF C在AF上 AD=CF求证:△ABC≌△DEF 如图,已知点F在BC边上,且DE‖BC,AB=AC,∠BAF=∠CAF,反向延长AF交DE于点G,求证:DG=EG. 已知:AB||DE,∠ABC+∠DEF=180°,求证BC||EF 快.... 已知:AB||DE,∠ABC+∠DEF=180°,求证BC||EF 如图，已知∠A=∠D，AB=DE，AF=CD，BC=EF．求证：BC∥EF． 已知;如图,在△ABC与△DEF中,AB=DE,BC=EF,AF=DC.求证；△ABC≌△DEF