document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=129203>Question 129203</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I drew the pentagon and not sure if I found all the triangles, I found 20 is this right or are there more. Heres the question. Thanks for your help.\r<BR>\n" );
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document.write( "Draw a pentagon with each of its five diagonals. How many triangles are contained in the figure? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #94438 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20849)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathLover1><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=MathLover1><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=94438\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=diagonals=d ALIGN=MIDDLE  ALT=\"diagonals=d\"   DISABLED_style= \"max-width:90%; height:auto;\" > in a polygon is: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d+=+%281%2F2%29+N%28N-3%29 ALIGN=MIDDLE  ALT=\"d+=+%281%2F2%29+N%28N-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "you have a pentagon, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=N=5 ALIGN=MIDDLE  ALT=\"N=5\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "so, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d+=+%281%2F2%29+5%285-3%29 ALIGN=MIDDLE  ALT=\"d+=+%281%2F2%29+5%285-3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d+=+%281%2F2%29+5%282%29 ALIGN=MIDDLE  ALT=\"d+=+%281%2F2%29+5%282%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d+=+%281%2F2%29+10+ ALIGN=MIDDLE  ALT=\"d+=+%281%2F2%29+10+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=d+=+5+ ALIGN=MIDDLE  ALT=\"d+=+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "The number of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=triangles=T ALIGN=MIDDLE  ALT=\"triangles=T\"   DISABLED_style= \"max-width:90%; height:auto;\" > (when you draw all the diagonals from <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=one ALIGN=MIDDLE  ALT=\"one\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+vertex ALIGN=MIDDLE  ALT=\"+vertex\"   DISABLED_style= \"max-width:90%; height:auto;\" >) in a polygon is: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T+=+%28N+-+2%29 ALIGN=MIDDLE  ALT=\"T+=+%28N+-+2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "the number of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=triangles=T ALIGN=MIDDLE  ALT=\"triangles=T\"   DISABLED_style= \"max-width:90%; height:auto;\" > \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T+=+%285+-+2%29 ALIGN=MIDDLE  ALT=\"T+=+%285+-+2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=T+=+3 ALIGN=MIDDLE  ALT=\"T+=+3\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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