document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=490711>Question 490711</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Assignment: \r<BR>\n" );
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document.write( "Proove the points A(6,-13) B(-2,2)  C(13,10) and D (21, -5) are the vertices of the square. Show that the diagonals bisect each other and of equal length. Please have a plan of what you're going to do before proceeding into solving the problem. <BR>\n" );
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document.write( "Hello! How am I going to solve this problem? Am I going to get their distances and midpoints? Please help me. Thank you :) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #334252 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=334252\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the points are really the vertices of a square, then <BR>\n" );
document.write( "AB to AC are perpendicular, or else,<BR>\n" );
document.write( "AB to AD are perpendicular<BR>\n" );
document.write( "also,<BR>\n" );
document.write( "CD to CA are perpendicular, or else<BR>\n" );
document.write( "CD to CB  are perpendicular<BR>\n" );
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document.write( "Find the equations for the pairs of points:<BR>\n" );
document.write( "AB<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y+-+%28-13%29%29+%2F+%28+x+-+6%29+=+%282+-%28-13%29%29+%2F+%28-2+-+6%29+ ALIGN=MIDDLE  ALT=\"%28y+-+%28-13%29%29+%2F+%28+x+-+6%29+=+%282+-%28-13%29%29+%2F+%28-2+-+6%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+%2B+13+=+15%2A%28x+-+6%29+ ALIGN=MIDDLE  ALT=\"+y+%2B+13+=+15%2A%28x+-+6%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+=+15x+-+103+ ALIGN=MIDDLE  ALT=\"+y+=+15x+-+103+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "AC<BR>\n" );
document.write( ".....<BR>\n" );
document.write( "Once you find the perpendicular lines, you can<BR>\n" );
document.write( "draw an approximate square. <BR>\n" );
document.write( "remember that slopes that are perpendicular<BR>\n" );
document.write( "are related as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+m%5B1%5D+=+-1%2Fm%5B2%5D+ ALIGN=MIDDLE  ALT=\"+m%5B1%5D+=+-1%2Fm%5B2%5D+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "The points that form diagonals will be obvious. </SPAN>\n" );
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