document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1128500>Question 1128500</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Using slopes, find the fourth vertex of a parallelogram<BR>\n" );
document.write( " If (7,-1), (-3,1) and (-5,5) are its consecutive vertices<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #745031 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=745031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Using slopes, find the fourth vertex of a parallelogram<BR>\n" );
document.write( " If (7,-1), (-3,1) and (-5,5) are its consecutive vertices<BR>\n" );
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document.write( "Label the points:<BR>\n" );
document.write( "A(7,-1), B(-3,1) and C(-5,5)<BR>\n" );
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document.write( "Find the slope of AB, and the slope of BC<BR>\n" );
document.write( "Call the 4th point D\r<BR>\n" );
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document.write( "The slope of AD will be the same as the slope of BC\r<BR>\n" );
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document.write( "The slope CD will be the same as the slope of AB<BR>\n" );
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document.write( "Find the equations of the lines AD and CD.<BR>\n" );
document.write( "The intersection is the point D\r<BR>\n" );
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