document.write( "Question 410597: If the sum of the vertex angles of a polygon is 540 degres, than it is called what? \n" ); document.write( "
Algebra.Com's Answer #288697 by Earlsdon(6294)\"\" \"About 
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Start with the formula for the sum (S) of the interior (vertex) angles of a polygon of n sides:
\n" ); document.write( "\"S+=+%28n-2%29%2A180\" and this is given as 540 degrees, so...
\n" ); document.write( "\"540+=+%28n-2%29%2A180\" Divide both sides by 180.
\n" ); document.write( "\"3+=+n-2\" Add 2 to both sides.
\n" ); document.write( "\"5+=+n\"
\n" ); document.write( "A five-sided plolygon is called a pentagon.
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