document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=119721>Question 119721</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 (-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 #87764 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=87764\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> SLOPE BETWEEN (-2,5) & (4,-1) IS (-1-5)/(4+2)=-6/6=-1<BR>\n" );
document.write( "SLOPE BETWEEN (4,5) & (-2,-1) IS (-1-5)/(-2-4)=-6/-6=1<BR>\n" );
document.write( "THESE TWO SLOPES ARE NEGATIVE RECIPRICALS OF EACH OTHER THUS THESE LINES ARE PERPENDICULAR. </SPAN>\n" );
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