Asked by Sarah

In parallelogram PQRS, diagonals PR and QS intrsect at M. Which is always true?
(1) PR is perpendicular to QS
(2) PM is congruent to RM
(3) PQ is congruent to QR
(4) triangle PMS is congruent to triangle PMQ
Answered by Reiny
obviously (2)
Answered by Sarah
But it does not say that M is the midpoint?
Answered by Reiny
One of the fundamental properties of a parallelogram is that its diagonals bisect each other
Answered by Sarah
Oh, I understand. Thank you!
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