SOLUTION: is the diagnals of a paralellogram congruent?

Question 379492: is the diagnals of a paralellogram congruent?
Found 2 solutions by robertb, richard1234:
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Only if the parallelogram is a rectangle (which includes the square, of course.)
Answer by richard1234(7193) (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.
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