document.write( "Question 834662: Help
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\n" ); document.write( "Work out the size of each exterior angle of a regular 20 sided polygon?
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Algebra.Com's Answer #503154 by Edwin McCravy(20060) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The sum of the measures of the exterior angles of any\r\n" );
document.write( "polygon is 360°.  Since the 20-sided polygon is a regular \r\n" );
document.write( "polygon, all 20 exterior angles have the same measure,\r\n" );
document.write( "so each is  or 18° each.  The green lines\r\n" );
document.write( "below form one exterior angle of the 20-sided polygon.\r\n" );
document.write( "It's interesting that each exterior angle is congruent to\r\n" );
document.write( "every central angle.  As you see below, each central angle \r\n" );
document.write( "also has measure 18°.\r\n" );
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document.write( "Edwin

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