如图,AB⊥BD于点D,AE交BD于点C,且BC=DC.求证:AB=ED
如图,AB垂直BD于点B,ED垂直BD于点D,AE交BD于点C,且BC=DC 求证:AB=ED
如图,AB⊥BC于点B,AD⊥DC于点D,若CB=CD连接AC,BD.求证:AC⊥BD,且∠AB
已知:如图,C,D为半圆上的两点,且BD弧=DC弧,连接AC并延长,与BD的延长线相交于点E求证:AB=AE,CD=ED
如图,在△ABC中,已知∠A等于90度,ED⊥BC于点D.AB=BD,求证:AE=ED
如图10,BC⊥AD于C,AF⊥BD于F交BC于E,AE=BD.若∠BAF=30°,求证:①AE+ED=AB;②BF=D
如图,AB=AC,∠BAC=90°,BD⊥AE于D,CE⊥AE于E,且BD>CE.求证:BD=EC+ED.
如图、ED‖AB、AE=ED、DC⊥AC于C,DB⊥AB于B,求证:CD=BD
如图,在△ABC中,∠BAC=90°,AB=AC,点D为AC中点,AE⊥BD于点E,AE交BC于点F,求证:∠ADB=∠
如图,D为△ABC内一点,且DB=DC,AB=AC,AD的延长线交BC于E点,求证:AE⊥BC.
如图,D为△ABC内一点,且DB=DC,AB=AC,AD的延长线交BC于E点,.求证AE⊥BC
如图,三角形abc中,点e,f分别在ab,ac上,且ae等于af,ef的延长线交bc的延长线于点d.求证:cd:bd=c
如图,在平行四边形ABCD中,已知:AE交BC与点E,交BD于点F,且BE²=EF×EA.求证:AB²