已知:如图,AD,BC相交于点O,OA=OD,AB∥CD.
如图,AD、BC相交于点O,OA=OD,AB//CD.求证:AB=CD
如图,AC与BD相交于点O,已知AB=CD,AD=BC,说明OA=OC,OB=OD的理由
已知:如图,AB平行CD,AD与BC相交于点O,且OA=OD.求证OB=OC
如图,AB‖CD,AD、BC相交于点O,若OA = 2,OD = 4,AB = 3.
如图,已知AD、BC交与点O,AB∥CD,OA=OD,求证:AB=CD
已知:如图,直线AD与BC交于点O,OA=OD,OB=OC.求证:AB∥CD.
已知:如图,AD与BC相交于点O,OA=OD,OB=OC.求证:
如图,AD和BC相交于点O,AB∥CD,且OC=OD.求证:OA=OB(要完整的过程)
如图,AD和BC相交于点O,OA=OD,OB=OC.求证AB平行DC?
已知:如图,AB与CD相交于点O,且OA=OD,OB=OC 求证:AD平行CB
如图,已知AB,cD相交于点O,且AB=cD,AD=CB,求证OB=OD
如图,已知AB,CD相交于点O,且AB=CD,AD=CB.求证:OB=OD