document.write( "Question 519512: interior angle of a regular polygon is 20 more than 3x the measure of its exterior angle. find the number of sides \n" ); document.write( "
Algebra.Com's Answer #345675 by Alan3354(69443)\"\" \"About 
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x + 3x + 20 = 180
\n" ); document.write( "x = 40 degs exterior angle
\n" ); document.write( "n = 360/40 = 9 sides
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