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在R△ABC中,∠ACB=90°,CD⊥AB于D,∠BAC的平分线AF交CD于点E,交BC于F,CM⊥AF于M,CM的延长线交AB于点N.(1)求证:EM=FM;(2)求证:AC=AN
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如图5在△ABC中∠ACB=90°CD⊥AB垂足为D若角B=30°CD=6求AB的长.
如图在△ABC中∠ACB=90°CD是AB边上的高AE是∠BAC的角平分线AE与CD交于点F.求证△
如图所示在△ABC中∠ACB=90°CD⊥AB于D.AE平分∠BAC交BC于E.交CD于F.FG∥
在Rt△ABC中∠ACB=90°AD平分∠BAC与BC相交于点D若BD=4CD=2求AB的长.
如图在Rt△ABC中∠ACB=90°AD平分∠BAC与BC相交于点D.若BD=5CD=3则AB的长是
如图所示若△ABC中∠ACB=90°∠BAC=60°AB=8PC⊥平面ABCPC=4M.是AB上一点
在Rt△ABC中∠ACB=90°CD⊥AB垂足为D如果CD=4BD=3那么∠A的正弦值是.
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如图.在△ABC中∠ACB=90°CD⊥AB于DAE平分∠BAC分别于BC.CD交于E.FEH⊥AB
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1如图1在△ABC中∠ACB=2∠B.∠C.=90°AD为∠BAC的平线交BC于D.求证AB=AC+
如图已知AB=CD那么还应添加一个条件才能推出△ABC≌△CD
则从下列条件中补充一个条件后,仍不能判定△ABC≌△CDA的是( )
A.BC=AD
∠B.=∠D.=90°
∠ACB=∠CAD
∠BAC=∠DCA
在Rt△ABC中∠ACB=90°CD是斜边AB上的中线CD=4AC=6则sinB的值是.
在Rt△ABC中∠ACB=90°CD是斜边AB上的中线CD=4AC=6则sinB的值是______.
如图在Rt△ABC中∠ACB=90°AD平分∠BAC与BC相交于点D.若BD=4CD=2则AB的长是
在△ABC中若AC=BC∠ACB=90°AB=10则AC=______AB边上的高CD=______
在Rt△ABC中ÐACB=90°D.是AB的中点CD=4cm则AB=cm
如图在Rt△ABC中∠ACB=90°AD平分∠BAC与BC相交于点D若BD=4CD=2则AB的长是.
如图△ABC中∠ACB=90°CD是斜边AB上的高BD=9AD=4那么CD=
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