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April 19, 2015

April 19, 2015

Posted by **Jack Reeg** on Sunday, August 25, 2013 at 12:02am.

- Algebra -
**Anonymous**, Sunday, August 25, 2013 at 5:50amAngle PQR is 90 degrees.

4+7a + 9+4a = 90

Solve for a, and substitute back into the expressions for the angles

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