document.write( "Question 271113: the sum of the interior angles of a polygon is 1260 degree.what is the number of sides of this polygon \n" ); document.write( "
Algebra.Com's Answer #198516 by edjones(8007)\"\" \"About 
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Let n=number of sides.
\n" ); document.write( "180(n-2)=1260
\n" ); document.write( "n-2=7
\n" ); document.write( "n=9
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