document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1203418>Question 1203418</A>: <I><SPAN STYLE=\"word-break: break-all;\"> solve by addition of line segments show whether the points a(-3,0), b(-1,-1) and c(5,-4) lie on a straight line.\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #838958 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=838958\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "I'm not sure why the other tutors have a problem with \"addition of line segments\".<br><BR>\n" );
document.write( "The three points are collinear if (and only if) the length of AC is the sum of the lengths of AB and BC.<br><BR>\n" );
document.write( "AB: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%282%5E2%2B1%5E2%29=sqrt%285%29 ALIGN=MIDDLE  ALT=\"sqrt%282%5E2%2B1%5E2%29=sqrt%285%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "BC: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%286%5E2%2B3%5E2%29=sqrt%2845%29=3sqrt%285%29 ALIGN=MIDDLE  ALT=\"sqrt%286%5E2%2B3%5E2%29=sqrt%2845%29=3sqrt%285%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "AC: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=sqrt%288%5E2%2B4%5E2%29=sqrt%2880%29=4sqrt%285%29 ALIGN=MIDDLE  ALT=\"sqrt%288%5E2%2B4%5E2%29=sqrt%2880%29=4sqrt%285%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=AB%2BBC=sqrt%285%29%2B3sqrt%285%29=4sqrt%285%29=AC ALIGN=MIDDLE  ALT=\"AB%2BBC=sqrt%285%29%2B3sqrt%285%29=4sqrt%285%29=AC\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "The three points are collinear.<br><BR>\n" );
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