document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=188752>Question 188752</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Points are marked on a circle, and chords are drawn joining all the points.\r<BR>\n" );
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document.write( "1 point - 0 chords<BR>\n" );
document.write( "2points - 1 chord<BR>\n" );
document.write( "3 ponts  - 3 chords\r<BR>\n" );
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document.write( "find an expression for the number of chords if there are n points on the circle. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #141584 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=141584\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> for each of the n points, a chord can be drawn to each of the other n-1 points\r<BR>\n" );
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document.write( "BUT .... a chord from A to B is the same as a chord from B to A, so half of the chords are duplicates\r<BR>\n" );
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document.write( "so the number of chords for n points is ... [n * (n-1)] / 2 </SPAN>\n" );
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