14.对于如图的给定图形(不再添线),从①AD=AE;②DB=EC;③AB=AC;④OD=OE中选取两个为已知条件...
14.对于如图的给定图形(不再添线),从①AD=AE;②DB=EC;③AB=AC;④OD=OE中选取两个为已知条件...
已知:如图,AD/AB=AE/BC求证:AD/AE=DB/EC和AB/DB=AC/EC
如图,已知AD/DB=AE/EC,求证 :AD/AB=AE/AC.
如图 已知AD/DB=AE/EC=3/2,求AB/DB,EC/AC,AB/AD
如图,已知AB=AC,AD=AE,DB与CE相交于O.(1)若DB⊥AC于D,CE⊥AB于E,试判断OE与OD的
如图,已知AD/DB=AE/EC=2/3,求AD/AB和EC/AC
如图,已知AD/AE=DB/EC,AD=15,AB=35,AC=30,求AE
如图,AD/DB=AE/EC=2/3,求AB/DB、AE/AC的值.
如图,在三角形ABC中,AB:DB=AC:EC,求证AD:AB=AE:AC,AD:DB=AE:EC
如图 已知,ad垂直于bd ae垂直于ec ad=ae ab=ac,bd,ce交于点o(1)bd=ce(2)oe=od(
如图,已知AB=AC,DB=DC,AD的延长线交BC于E.求证:(1)BE=EC;(2)AE垂直BC.
如图,△ABC已知 AD/DB= AE/EC,AB=12,AE=6,EC=4.求AD的长