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如图,BD=CD,AE∶DE=1∶2,延长BE交AC于F,且AF=5cm,则AC的长为( )。
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如图在□ABCD中延长CD到E.使DE=CD连接BE交AD于点F.交AC于点G.1求证AF=DF2若
如图在△ABC中∠BAC=90°AB=AC点D.是AB的中点连接CD过B.作BE⊥CD交CD的延长线
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如图1Rt△ABC中∠ACB=90°AB=5BC=3点D在边AB的延长线上BD=3过点D作DE⊥AB
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如图在□ABCD中延长CD到E.使DE=CD连接BE交AD于点F.交AC于点G.1求证AF=DF2若
如图BD=CDAE:DE=1:2延长BE交AC于F且AF=5cm则AC的长为.
30cm
25cm
15cm
10cm
如图在等边三角形ABC中点D.E.分别在边BCAC上且DE∥AB过点E.作EF⊥DE交BC的延长线于
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如图△ABC的面积为63D.是BC上的一点且BD∶CD=2∶1DE∥AC交AB于点E.延长DE到F.
如图在△ABC中AC=BC∠ACB=90°AE平分∠BAC交BC于E.BD⊥AE交AE延长线于D.D
1个
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如图在△ABC中AB=AC点D.E是边BC上的两个点且BD=DE=EC过点C作CF∥AB交AE延长线
如图在△ABC中∠ACB=90°AC=BCAE是BC边的中线过点C.作CF⊥AE垂足为点F.过点B作
如图已知⊙O.是△ABC的外接圆AB是⊙O.的直径D.是AB延长线的一点AE⊥CD交DC的延长线于E
如图AB是△ABC的外接圆⊙O.的直径D.是⊙O.上的一点DE⊥AB于点E.且DE的延长线分别交AC
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