document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=97754>Question 97754</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many quadrilaterals can be found from joining the vertices of a heptagon? Can you please provide me with a formula that will work for all polygons? \r<BR>\n" );
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document.write( "Regards. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #71147 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=71147\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> How many quadrilaterals can be found from joining the vertices of a heptagon? Can you please provide me with a formula that will work for all polygons? <BR>\n" );
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document.write( "Quadrilaterals have four vertices.<BR>\n" );
document.write( "A heptagon has seven vertices.<BR>\n" );
document.write( "The number of ways you can select four from the seven is 7C4 = 7!/(7-4)!4!<BR>\n" );
document.write( "= 35<BR>\n" );
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document.write( "If a n-gon has n vertices you can form nC4 quadrilaterals.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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