Question

A quadrilateral must be a parallelogram if one pair of opposite sides is​

Answer 1

Answer:

Theorem 3: A quadrilateral is a parallelogram if and only if the diagonals bisect each other.

Theorem 4: If one pair of opposite sides in a four sided figure are both opposite and parallel, then the figure is a parallelogram.

Answer 2

If and only if the diagonals bisect each other, a quadrilateral is a parallelogram.

A parallelogram is formed when one set of opposite sides in a four-sided shape are both opposed and parallel.

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