document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=841424>Question 841424</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ABCD is a quadrilateral with A(8,-1), B(10,-7), C(-6,-1), and D(0,2). Determine whether ABCD is a trapezoid. Justify your answer algebraically. \r<BR>\n" );
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document.write( "Thanks a lot! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #506940 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39630)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=506940\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (EDIT: The distance formula should NOT be needed.)<BR>\n" );
document.write( "Use formula for slope to get the slope of each side's line.\r<BR>\n" );
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document.write( "A trapezoid will have exactly one pair of opposite sides being parallel, meaning their slopes are equal.  Also, their lengths will be different.\r<BR>\n" );
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document.write( "I did not give you the solution or the specific steps, but you should be able to perform them yourself, based on relationships I briefly described. </SPAN>\n" );
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