document.write( "Question 403149: how do you find the number of sides of a polygon if the interior angles measure 140 degrees \n" ); document.write( "
Algebra.Com's Answer #285098 by Alan3354(69443)\"\" \"About 
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The exterior angles are 40º (180 - 140)
\n" ); document.write( "The sum of ext angles of ALL polygons = 360º
\n" ); document.write( "360/40 = 9 sides
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