document.write( "Question 454773: what is the area of a decagon with a perimiter of 20 inches \n" ); document.write( "
Algebra.Com's Answer #312267 by Gogonati(855)\"\" \"About 
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If we consider the regular decagon, its area is given by the formula:\r
\n" ); document.write( "\n" ); document.write( "\"A=p%2Aa%2F2\", where p is the perimeter and a the apotem ( Apotem is the line \r
\n" ); document.write( "\n" ); document.write( "segment from the center of decagon perpendicular to the side)\r
\n" ); document.write( "\n" ); document.write( "\"a=1%2Ftan18=3.08\"inches. and \"A=20%2A3.08%2F2=30.8\" square inches.
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