document.write( "Question 612390: The diagram shows 3 sides of a regular polygon. \r
\n" ); document.write( "\n" ); document.write( "Each interior angle of the regular polygon is 140 degrees, work out the number of sides of the regular polygon.
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Algebra.Com's Answer #385413 by vleith(2983)\"\" \"About 
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Look at this URL
\n" ); document.write( "http://www.mathsisfun.com/geometry/interior-angles-polygons.html\r
\n" ); document.write( "\n" ); document.write( "Read it and see how one can build on what you know about triangles and extend that into the general rule. \r
\n" ); document.write( "\n" ); document.write( "In your specific case, \r
\n" ); document.write( "\n" ); document.write( "\"%28%28n-2%29%2A180%29%2Fn+=+140\"
\n" ); document.write( "So simplify and solve for n
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