document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=338359>Question 338359</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many diagonal lines are there in a 25-sided polygon? ... How do I come up with this?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #242567 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=242567\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> n(n-3)/2 Number of diagonals in any convex polygon. n=number of sides.<BR>\n" );
document.write( "25(25-3)/2<BR>\n" );
document.write( "=25*22/2<BR>\n" );
document.write( "=25*11<BR>\n" );
document.write( "=275<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
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