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OpenStudy (anonymous):
HELP one question Which of the following conditions or set of conditions is sufficient for a parallelogram to be a square? Diagonals are perpendicular and diagonals are congruent. Diagonals are congruent. All sides are congruent. The length of a diagonal is equal to the length of a side.
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OpenStudy (anonymous):
Diagonals are perpendicular and diagonals are congruent.
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