document.write( "Question 865604:
\n" ); document.write( "Find the number of sides of a regular polygon if one interior angle is 120 degrees.\r
\n" ); document.write( "\n" ); document.write( "6
\n" ); document.write( "5
\n" ); document.write( "4
\n" ); document.write( "3
\n" ); document.write( "

Algebra.Com's Answer #521799 by htmentor(1343)\"\" \"About 
You can put this solution on YOUR website!
The sum of the interior angles of a regular polygon is S = 180(n-2), where n = the number of sides
\n" ); document.write( "If one of the angles is 120, then the sum of all the angles is 120n
\n" ); document.write( "120n = 180n - 360
\n" ); document.write( "60n = 360
\n" ); document.write( "n = 6
\n" ); document.write( "
\n" );