Question

..A quadrilateral is a parallelogram if a pair of opposite sides is equal and parallel..

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Answer 1

Answer:

1. DEFINITION: A parallelogram is a quadrilateral with both pairs of opposite sides parallel. THEOREM: If a quadrilateral has 2 sets of opposite sides congruent, then it is a parallelogram. THEOREM: If a quadrilateral has 2 sets of opposite angles congruent, then it is a parallelogram.

Answer 2

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