document.write( "Question 859611: a convex polygon has 20 sides, find the sum of the interior angles. \n" ); document.write( "
Algebra.Com's Answer #517846 by jim_thompson5910(35256)\"\" \"About 
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S = 180(n-2)\r
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\n" ); document.write( "\n" ); document.write( "S = 180(20-2)\r
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\n" ); document.write( "\n" ); document.write( "S = 180*18\r
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\n" ); document.write( "\n" ); document.write( "S = 3,240\r
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\n" ); document.write( "\n" ); document.write( "So the sum of the interior sides is 3,240 degrees
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