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在四边形ABCD中,(1)AB∥CD,(2)AD∥BC,(3)AB=CD,(4)AD=BC,在这四个条件中任选两个作为已知条件,能判定四边形ABCD是平行四边形的概率是 .
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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
已知四边形ABCD中AB∥CD.则添加下列条件不能使四边形ABCD成为平行四边形的是
AB=CD
∠B.=∠D
AD∥BC
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
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
在四边形ABCD中已知AB∥CD下列条件中无法判定该四边形为平行四边形的是
AB=CD
AD//BC
AD=BC
∠A.=∠C.
已知四边形ABCD中AD∥BC分别添加下列条件之一①AB∥CD②AB=CD③AD=BC④∠
=∠C.,⑤∠
=∠D.,能使四边形ABCD成为平行四边形的条件的个数是( ) A.4 B.3
2
1
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
在四边形ABCD中对角线AC.BD相交于点O.给出下列四组条件①AB∥CDAD∥BC②AB=CDAD
1组
2组
3组
4组
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
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
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
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
在四边形ABCD中从①AB∥CD②AB=CD③BC∥AD④BC=AD中任选两个使四边形ABCD为平行
3
4
5
6
已知如图四边形ABCD中AB⊥BCAB=1BC=2CD=2AD=3求四边形ABCD的面积.
不能判断四边形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
四边形ABCD中如果AB=BCCD=AD那么四边形ABCD是平行四边形
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.
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