如图:已知:AB=AC,AD=AE,求证BO=CD
已知,如图,AD//BC,且BD垂直CD,BD=CD,AC=BC,求证:AB=BO
如图,已知AE⊥AD,AF⊥AB,AB//CD,AE=CD,AE=AD,AF=CD,求证AC=EF
如图,已知AB=AD,CD=CB,AC与BD交于点O,求证:BO=DO
如图,已知AB垂直AC,AD垂直AE,AB=AC,AD=AE,求证BE=CD且BE垂直CD.图在后面.
如图,AB⊥AC,AD⊥AE,AB=AC,AD=AE.求证BE⊥CD
如图,已知AE⊥AD,AF⊥AB,AB∥CD,AF=CD,AE=AD,求证:AC垂直EF.
如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC.
如图,已知:四边形ABCD中,AD//BC,BO²=OE×OF,求证:AB//CD
已知:如图,AC/AD=AB/DE=BC/AE.求证AB=AE
已知:如图,AB=AC,AD=AE,BE、CD交于点G.求证:AG平分角BAC
已知:如图,CD,BE是三角形ABC的高.求证:(1).AD:AC=AE:AB (2).角AED
已知如图,AB=AC,∠1=∠2,AD⊥CD,AE⊥BE,求证:AD=AE