求证:ab-ac>bd-cd
已知:如图,AB=BD,AC⊥CD,AB=AC.求证:BD=CD
已知AB⊥BD,AC⊥CD,AB=AC,求证BD=CD
如图,已知AB⊥BD,AC⊥AB,AB=AC,求证:BD=CD
如图所示,AB=CD,BD=AC,AB//CD.求证,AB⊥BC,全等三角形!
如图,已知AB∥CD,AB=CD,求证:AC与BD平分.
求证AC=AB+BD
如图:AB⊥BD,ED⊥BD,AB=CD,AC=CE.求证:AC⊥CE.
如图,已知AB垂直BD,ED垂直BD,AC垂直CE,且AB等于CD,求证:AC等于CE.
AB=CD,BF⊥AC,DE⊥AC,AE=CF,求证:BD平分EF
已知 AB=AC BD=BC BA垂直AC 求证CO=CD
已知三角形ABC中,AD是高,AB+CD=AC+BD.求证:AB+BC
已知,如图,AD//BC,且BD垂直CD,BD=CD,AC=BC,求证:AB=BO