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如图,在四边形ABCD中,AB∥CD,2AB=2BC=CD=10,tanB=,则AD= .
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在四边形ABCD中1AB∥CD2AD∥BC3AB=CD4AD=BC在这四个条件中任选两个作为已知条件
已知四边形ABCD则下列说法中正确的是
若AB∥CD,AB=CD,则四边形ABCD是平行四边形;
若AC⊥BD,AC=BD,则四边形ABCD是矩形;
若AC⊥BD,AB=AD,CB=CD则四边形ABCD是菱形;
若AB=BC=CD=AD,则四边形ABCD是正方形;
已知四边形ABCD则下列说法中正确的是
若AB∥CD,AB=CD,则四边形ABCD是平行四边形
若AC⊥BD,AC=BD,则四边形ABCD是矩形
若AC⊥BD,AB=AD,CB=CD则四边形ABCD是菱形
若AB=BC=CD=AD,则四边形ABCD是正方形
如图在四边形ABCD中对角线AC.BD相交于点O.下列条件不能判定四边形ABCD为平行四边形的是
AB∥CD,AD∥BC
OA=OC,OB=OD
AD=BC,AB∥CD
AB=CD,AD=BC
如图在四边形ABCD中∠B.=90°CD⊥ADAD2+CD2=2AB2.求证AB=BC.
如图在四边形ABCD中AB∥CD∠BAD=90°AB=5BC=12AC=13.求证四边形ABCD是矩
在四边形ABCD中1AB∥CD2AD∥BC3AB=CD4AD=BC在这四个条件中任选两个作为已知条件
下列条件中不能判定四边形ABCD为平行四边形的是
AB=CD,AD=BC
AB∥CD,AB=CD
AB=CD ,AD∥BC
AB∥CD,AD∥BC
下列条件中不能确定四边形ABCD是平行四边形的是
AB=CD,AD∥BC
AB=CD,AB∥CD
AB∥CD,AD∥BC
AB=CD,AD=BC
如图在四边形ABCD中∠C.=60º∠B.=∠D.=90ºAD=2ABCD=3求BC的长.
下列条件中不能确定四边形ABCD是平行四边形的是
AB=CD,AD∥BC
AB=CD,AB∥CD
AB∥CD,AD∥BC
AB=CD,AD=BC
如图在四边形ABCD中对角线AC.BD相交于点O.下列条件不能判定四边形ABCD为平行四边形的是
AB∥CD,AD∥BC
OA=OC,OB=OD
AD=BC,AB∥CD
AB=CD,AD=BC
在四边形ABCD中1AB∥CD2AD∥BC3AB=CD4AD=BC在这四个条件中任选两个作为已知条件
如图在四边形ABCD中对角线AC.BD相交于点O.下列条件不能判定四边形ABCD为平行四边形的是
AB∥CD,AD∥BC
OA=OC,OB=OD
AD=BC,AB∥CD
AB=CD,AD=BC
已知如图在四边形ABCD中∠ABC=900CD⊥ADAD2+CD2=2AB2.求证AB=BC.
在四边形ABCD中1AB∥CD2AD∥BC3AB=CD4AD=BC在这四个条件中任选两个作为已知条件
已知如图四边形ABCD中AB⊥BCAB=1BC=2CD=2AD=3求四边形ABCD的面积.
已知四边形ABCD中有四个条件AB∥CDAB=CDBC∥ADBC=AD从中任选两个不能使四边形ABC
AB∥CD,AB=CD
AB∥CD,BC∥AD
AB∥CD,BC=AD
AB=CD,BC=AD
已知如图四边形ABCD中AB⊥BCAB=1BC=2CD=2AD=3求四边形ABCD的面积.
已知如图四边形ABCD中AB⊥BCAB=1BC=2CD=2AD=3求四边形ABCD的面积.
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