document.write( "Question 672497: The sum of the angles of an n sided polygon is double the sum of the exterior angles.calculate n\r
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Algebra.Com's Answer #418180 by Alan3354(69443)\"\" \"About 
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The sum of the angles of an n sided polygon is double the sum of the exterior angles.calculate n
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\n" ); document.write( "The sum of exterior angles = 360 (always)
\n" ); document.write( "--> sum of interior angles = 720 degs
\n" ); document.write( "180*(n-2) = 720
\n" ); document.write( "etc\r
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