document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=287311>Question 287311</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am totally lose on this one and have no idea how to do it. Use slopes to show that the square with vertices at (-2, 5), (4, 5), (4, -1), and (-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 #208251 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=208251\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> plot these so you know which points are the diagonals.<BR>\n" );
document.write( "take the points of the ends of the diagonals and find the slopes of the diagonals.<BR>\n" );
document.write( "if the product of the slopes is -1 then they are perpendicular </SPAN>\n" );
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