document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=143178>Question 143178</A>: <I><SPAN STYLE=\"word-break: break-all;\"> parallelogram abcd is not a rectangle  the points of a b c and d are (-2,2) (6,5) (4,0) (-4,-3)   prove that paralleogram is not a rectangle </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #104230 by </B><A HREF=/tutors/aboutme.mpl?userid=vleith><B>vleith(2983)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=vleith><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=104230\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> All you need to do is prove the line segments that create one of the vertex are not at right angles.\r<BR>\n" );
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document.write( "Find the slope of one side segment, then find the slope of the segment that intersects at that vertex. Then show the products of those slopes is not equal to -1.\r<BR>\n" );
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document.write( "If you can show that, then the shape cannot be a rectangle. </SPAN>\n" );
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