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Which of the following is not a sufficient condition for a quadrilateral to be a parallelogram?

One pair of opposite sides is congruent

Both pairs of opposite sides are congruent

Both pairs of opposite sides are parallel

One pair of opposite sides is congruent and parallel

 Jul 3, 2018
 #1
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Both pairs of opposite sides are congruent

Both pairs of opposite sides are parallel

laugh

 Jul 3, 2018

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