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如图,在▱ABCD中,AD=7,点E、F分别是BD、CD的中点,则EF等于( )
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教案备课库《2017年河北省廊坊市广阳区中考数学二模试卷》真题及答案
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如图在ABCD中AD=8点E.F.分别是BDCD的中点则EF=.
如图▱ABCD中BD⊥AD∠A.=45°E.F.分别是ABCD上的点且BE=DF连接EF交BD于O.
如图12在□ABCD中AD=8点E.F.分别是BDCD的中点则EF=
如图在▱ABCD中AD=8点E.F.分别是BDCD的中点则EF等于
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如图12在□ABCD中AD=8点E.F.分别是BDCD的中点则EF=
如图在四面体ABCD中CB=CDAD⊥BD点E.F.分别是ABBD的中点求证1直线EF∥平面ACD2
在四面体ABCD中CB=CDAD⊥BDEF分别是ABBD的点且AD∥平面CEF1求证EF∥AD2若E
如图在▱ABCD中BD为对角线E.F.分别是AD.BD的中点连接EF.若EF=3则CD的长为
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如图2在ABCD中AD=8点E.F.分别是BDCD的中点则EF=.
如图▱ABCD中BD⊥AD∠A.=45°E.F.分别是ABCD上的点且BE=DF连接EF交BD于O.
如图在四面体ABCD中CB=CDAD⊥BD点E.F.分别是ABBD的中点.求证1直线EF∥面ACD2
如图在四棱锥P.-ABCD中PD⊥面ABCDAD∥BCCD=13AB=12BC=10AD=12BC.
如图在直角梯形ABCD中AD∥BCAD⊥DC点A关于对角线BD的对称点F刚好落在腰DC上连接AF交B
如图在ABCD中AD=8点E.F.分别是BDCD的中点则EF等于
2
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4
5
如图在四边形ABCD中E.F.分别是ADBC的中点G.H.分别是BDAC的中点当ABCD满足什么条件
在梯形ABCD中AD∥BC点E.F.分别是ABCD的中点若AD=5BC=7则EF=.
如图在矩形ABCD中对角线ACBD相交于点O.点E.F.分别是AOAD的中点若AB=6BC=8则的周
如图在矩形ABCD中点E.F.分别是边ABCD的中点.求证DE=BF.
如图D是△ABC内一点BD⊥CDAD=6BD=4CD=3E.FGH分别是AB.AC.CD.BD的中点
如图1在四边形ABCD中AB=CDE.F.分别是BCAD的中点连接EF并延长分别与BACD的延长线交
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