Homework Help: geometry

Posted by Sara on Thursday, February 28, 2008 at 5:50pm.

find the measure of angel R in quadrilateral RSTW if the measure of angle R= 2x, the measure of angle S= x-7, the measure of angle T= x+5, and the measure of angle W= 30.

geometry - Reiny, Thursday, February 28, 2008 at 6:14pm
The angles of a quad add up to 360º
so
2x + x-7 + x+5 + 3- = 360

solve for x
geometry - IMO Gold, Saturday, March 9, 2013 at 9:03am
Cyclic quads

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