document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=466430>Question 466430</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Use slopes to show that the square with vertices at (-2, 5), (4, 5), (4, -1), and<BR>\n" );
document.write( "(-2, -1) has diagonals that are perpendicular. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #319755 by </B><A HREF=/tutors/aboutme.mpl?userid=Gogonati><B>Gogonati(855)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Gogonati><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=Gogonati><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=319755\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The slope of the diagonal AC is: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%5B1%5D=%28-1-5%29%2F%284%2B2%29=-1 ALIGN=MIDDLE  ALT=\"m%5B1%5D=%28-1-5%29%2F%284%2B2%29=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and the slope of the \r<BR>\n" );
document.write( "\n" );
document.write( "diagonal BD is:<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%5B2%5D=%28-1-5%29%2F%28-2-4%29=%2B1 ALIGN=MIDDLE  ALT=\"m%5B2%5D=%28-1-5%29%2F%28-2-4%29=%2B1\"   DISABLED_style= \"max-width:90%; height:auto;\" >, since the product of their slopes is \r<BR>\n" );
document.write( "\n" );
document.write( "-1 the diagonals are perpendicular. (<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=m%5B1%5D%2Am%5B2%5D=-1%2A1=-1 ALIGN=MIDDLE  ALT=\"m%5B1%5D%2Am%5B2%5D=-1%2A1=-1\"   DISABLED_style= \"max-width:90%; height:auto;\" >). </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );