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如图,在△ABC中,BF平分∠ABC,AF⊥BF,D为AB中点,连接DF并延长交AC与点E,若AB=12,BC=20,则线段EF的长为( )
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如图△ABC中D.是BC的中点DE∥ABBF平分∠ABC交DE于点F.若DF=6则BC的长是____
如图在△ABC中BF平分∠ABCAF⊥BF于点FD为AB的中点连接DF延长交AC于点E.若DF=5
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如图在△ABC中AD为∠CAB平分线BE⊥AD于E.EF⊥AB于F.∠DBE=∠C.=15°AF=2
如图在△ABC中E.F.分别是ABAC上两点EF∥BCBF平分∠ABC.若∠BFE=35°则∠AEF
题面如图△ABC的边BC的垂直平分线DE交△BAC的外角平分线AD于D.E.为垂足DF⊥AB于F.且
如图在△ABC中BF平分∠ABCAF⊥BF于点FD为AB的中点连接DF延长交AC于点E.若AB=1
1如图1在△ABC中∠ABC的平分线BF交AC于F.过点F.作DF∥BC求证BD=DF.2如图2在△
如图在△ABC中AD平分∠BAC过B.作BE⊥AD于E.过E.作EF∥AC交AB于F.则
AF=2BF
AF=BF
AF>BF
AF<BF
在△ABC中BF平分∠ABCAF⊥BF于点F.D.为AB的中点连结DF并延长交AC于点E.若AB=1
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如图所示在△ABC中BF平分∠ABCAF⊥BF于点FD为AB的中点连接DF并延长交AC于点E.若AB
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如图在□ABCD中BF平分∠ABC交AD于点F.CE平分∠BCD交AD于点E.AB=6EF=2则BC
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如图在四边形ABCD中AB=BCBF是∠ABC的平分线AF∥DC连接ACCF求证CA是∠DCF的平分
如图△ABC中AB=ACDE垂直平分ABBE⊥ACAF⊥BC则下面结论错误的是
BF=EF
DE=EF
∠EFC=45°
∠BEF=∠CBE
如图在△ABC中EF是AC的垂直平分线AF=12BF=3则BC=__________.
如图在△ABC中BF平分∠ABCAF⊥BFD为AB中点连接DF并延长交AC与点E若AB=12BC=
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3.00分如图在△ABC中BF平分∠ABCAF⊥BF于点FD为AB的中点连接DF延长交AC于点E.
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如图△ABC为等边三角形P.是∠ABC平分线BD上的一点PE⊥AB于E.线段BP的垂直平分线交BC于
如图4在等腰△ABC中AB=AC∠BAC=36°AE是△ABC的外角平分线BF是∠ABC的平分线BF
如图在△ABC中BF平分∠ABCAF⊥BF于点FD为AB的中点连接DF并延长交AC于点E.若AB=1
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如图已知AB∥CD∠A=100°CB平分∠ACD求∠ACD.∠ABC的度数.
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