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Mathematics 18 Online
OpenStudy (anonymous):

True or False? If a circle is circumscribed about a parallelogram, the parallelogram must be a rectangle.

OpenStudy (anonymous):

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OpenStudy (anonymous):

True! thanks :)

jimthompson5910 (jim_thompson5910):

Don't rely on the drawing alone. Use properties, theorems and postulates to prove or disprove the claim.

jimthompson5910 (jim_thompson5910):

2 hints: the opposite angles of any parallelogram are always congruent if a quadrilateral is inscribed in a circle, then the opposite angles are supplementary

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