In Exercises 25 to 28, write a formal proof of each theorem or corollary. If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram.

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In Exercises 25 to 28, write a formal proof of each theorem or corollary. If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram.

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Solutions

In Exercises 25 to 28, write a formal proof of each theorem or corollary.

If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram.

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