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Which of the following is NOT a property of all parallelograms

(1) the diagonals are perpendicular
(2) the diagonals bisect each other
(3) opposite sides are congruent
(4) adjacent angles are supplementary​

User Nforss
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2 Answers

6 votes
2, the diagonals bisect each other :)
User Adriano Monecchi
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5 votes
2- the diagnosis bisect each other
User Pratik Mehta
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