document.write( "Question 18501: What is the interior angle sum of a 30-sided Polygon- show the formula.
\n" ); document.write( "(its an extra credit question for tonight) \n" ); document.write( "

Algebra.Com's Answer #8886 by xcentaur(357) $\"\"$ $\"About$

You can put this solution on YOUR website!
For a polygon with n sides,
\n" ); document.write( "exterior angle=360/n
\n" ); document.write( "so for a 30-side polygon,
\n" ); document.write( "ext angle=360/30=12 degrees
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\n" ); document.write( "Now,
\n" ); document.write( "interior angle=180-exterior angle
\n" ); document.write( "So for 30-sided polygon,
\n" ); document.write( "int angle=180-12=168 degrees
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\n" ); document.write( "Sum of int angles of a polygon=
\n" ); document.write( " $\"%28n%2A%28180-%28360%2Fn%29%29%29\"$
\n" ); document.write( "=n*int angle
\n" ); document.write( "=30*168
\n" ); document.write( "=5040 degrees
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\n" ); document.write( "Hope this helps,
\n" ); document.write( "Prabhat \n" ); document.write( "

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