A parallelogram is a rectangle if its diagonals ____
congruent
A parallelogram is a rectangle if its diagonals are congruent, meaning they have the same length. Additionally, the diagonals of a rectangle bisect each other, which means that they intersect at their midpoint, dividing each diagonal into two equal segments of the same length. Therefore, if we know that the diagonals of a parallelogram are congruent and bisect each other, we can conclude that the parallelogram is a rectangle.
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