document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1081647>Question 1081647</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A quadrilateral has 4 sides and 2 diagonals. A pentagon has 5 sides and 5 diagonals. You can use 1/2n^2 to find the number of diagonals in a polygon with n sides <BR>\n" );
document.write( "Write this expression in factored form. <BR>\n" );
document.write( "Find the the number of diagonals in a decagon.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #696023 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52925)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=696023\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "<H3>The condition is WRONG.</H3>\r<BR>\n" );
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document.write( "<H3>You <U>CAN NOT</U> use 1/2n^2 to find the number of diagonals in a polygon with n sides, because this formula is <U>WRONG</U>.</H3>.\r<BR>\n" );
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document.write( "The correct formula is N = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28n%2A%28n-3%29%29%2F2 ALIGN=MIDDLE  ALT=\"%28n%2A%28n-3%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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