SOLUTION: is the diagnals of a paralellogram congruent?

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Question 379492: is the diagnals of a paralellogram congruent?
Found 2 solutions by robertb, richard1234:
Answer by robertb(5830) About Me  (Show Source):
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Only if the parallelogram is a rectangle (which includes the square, of course.)

Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Not necessarily. The diagonals are congruent if and only if the parallelogram is a rectangle.