document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=977217>Question 977217</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How many lines can be drawn through four coplanar points,no three of which are collunear </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #598741 by </B><A HREF=/tutors/aboutme.mpl?userid=MathLover1><B>MathLover1(20850)</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=598741\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> to draw lines u have to select <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2 ALIGN=MIDDLE  ALT=\"2\"   DISABLED_style= \"max-width:90%; height:auto;\" > points at a time (as no <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3 ALIGN=MIDDLE  ALT=\"3\"   DISABLED_style= \"max-width:90%; height:auto;\" > are collinear)\r<BR>\n" );
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document.write( "thus number of selections of such points is:<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=nC2=+n%21%2F+%28+2%21+%28n-2%29%21%29 ALIGN=MIDDLE  ALT=\"nC2=+n%21%2F+%28+2%21+%28n-2%29%21%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >....since you have <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4 ALIGN=MIDDLE  ALT=\"4\"   DISABLED_style= \"max-width:90%; height:auto;\" > points, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=n=4 ALIGN=MIDDLE  ALT=\"n=4\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and we have\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4C2=+4%21%2F+%28+2%21+%284-2%29%21%29 ALIGN=MIDDLE  ALT=\"4C2=+4%21%2F+%28+2%21+%284-2%29%21%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=4C2=+4%21%2F+%28+2%21+%282%29%21%29 ALIGN=MIDDLE  ALT=\"4C2=+4%21%2F+%28+2%21+%282%29%21%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=4C2=+%284%2A3%2A2%2A1%29%2F+%28+2%2A1+%282%2A1%29%29 ALIGN=MIDDLE  ALT=\"4C2=+%284%2A3%2A2%2A1%29%2F+%28+2%2A1+%282%2A1%29%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=4C2=+%284%2A6%29%2F+4 ALIGN=MIDDLE  ALT=\"4C2=+%284%2A6%29%2F+4\"   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=4C2=+6 ALIGN=MIDDLE  ALT=\"4C2=+6\"   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=drawing%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%0D%0Acircle%281%2C1%2C.12%29%2Ccircle%281%2C5%2C.12%29%2Ccircle%28-2%2C2%2C.12%29%2Ccircle%28-3%2C5%2C.12%29%2C%0D%0Aline%281%2C10%2C1%2C-10%29%2C%0D%0Agraph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+5%2C-3x-4%2C-%281%2F3%29x%2B4%2F3%2C-x%2B2%29%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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