感谢您的鼓励领养亲∵AD∥BC∴∠ADE
=∠F∵E是AB的中点∴AE = BE和∵∠FEB =∠AED∴△ADE≌△BFE(AAS)EG位置关系DF EG⊥DF原因:∵∠GDF
=∠ADE∠ADE =∠BFE∴∠GDF =∠BFE∵(1)△AED≌△BFE为:DE = EF,GE是中线DF,∴GE⊥DF
感谢您的鼓励领养亲∵AD∥BC∴∠ADE
=∠F∵E是AB的中点∴AE = BE和∵∠FEB =∠AED∴△ADE≌△BFE(AAS)EG位置关系DF EG⊥DF原因:∵∠GDF
=∠ADE∠ADE =∠BFE∴∠GDF =∠BFE∵(1)△AED≌△BFE为:DE = EF,GE是中线DF,∴GE⊥DF