3. Tests for Parallelograms
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What conditions must a quadrilateral satisfy to be a parallelogram?
Yes.
To prove that a quadrilateral is a parallelogram, it is enough to show that one of the following conditions is satisfied.
Let's analyze the given quadrilateral.
Looking at the congruence markings, we can see that both pairs of opposite sides are congruent. Therefore, it is a parallelogram.