如图,AB//CD,AE//CF,求证∠BAE=∠DCE
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如图,AB⊥BC,CD⊥AD,AE平分∠BAD,CF平分∠DCB求证:AE//CF
如图,已知AB//CD,AE//CF,求证:∠BAE=∠DCF
如图,AB//CD,AE//CF,求证∠BAE=∠DCE
如图,CD=AB,AE=CF,DE=BF.求证AB‖CD
已知:如图AB=CD,AD=BC,BF=D E (1)求证:AD//BC,AB//CD (2)求证:AE//CF,AE=CF
如图,已知AB//CD,AD//BC,AE平分∠DAB,且AE//CF,求证CF平分∠BCDhttp://zhidao.baidu.com/question/1817913155582620348.html
如图,AB垂直于BD,CD平行于AB,AB等于CD,点E,F在BD上,且AE等于CF,求证AE平行于CF
如图,AB=AE ,∠ABC=∠AED,BC=ED,CF=DF,求证:AF⊥CD
如图,已知AB‖CD,OA=OD,AE=DF,求证:EB‖CF.
已知:如图,AB=CD,BC=DA,AE=CF.求证:DF=DE
如图CD=AB,DF=BE,AE=CF,求证:DF//BE
如图,已知AB=CD,AE=CF,DE=BF,求证AD=BC
如图,已知AD=CB,AE=CF,DE=BF,求证:AB∥CD.
如图AB=CD,BE=CF,AE=DF求证OA=OD
如图,已知AD=CB,AE=CF,DE=BF,求证AB=CD.
如图,AB=CD,AE=CF,求证△ABF全等△CDE.
已知:如图,AB=CD,AE=CF,BE=DF.求证:AF∥CE
如图,已知:△ABE≌△CDF.求证AB//CD,AE//CF