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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;
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
=∠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
AB=CD,AD=BC AB∥CD,AB=CD AB=CD ,AD∥BC AB∥CD,AD∥BC
AB=CD,AD∥BC AB=CD,AB∥CD AB∥CD,AD∥BC AB=CD,AD=BC
AB=CD,AD∥BC AB=CD,AB∥CD AB∥CD,AD∥BC AB=CD,AD=BC
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AB∥CD,AB=CD AB∥CD,BC∥AD
AB∥CD,BC=AD AB=CD,BC=AD
∠A.=∠C.,∠ =∠DB.AB∥CD,AB=CD AB=CD,AD∥BC AB∥CD,AD∥BC