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November 24, 2014

November 24, 2014

Posted by **nyomy** on Friday, April 1, 2011 at 9:04pm.

- math -
**Reiny**, Friday, April 1, 2011 at 9:14pmNope

All I need is one counter-example.

I just drew a quadrilateral ABCD with C=90

A=85

B=120 and D=65

If it were a parallelogram then a pair of adjacent angles would have to add to 180

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