document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1197252>Question 1197252</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the are of a quadrilateral having points (5,2), (4,3), (2,4), (-8,-1) as consecutive vertices. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #830462 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=830462\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find the are of a quadrilateral having points A(5,2), B(4,3), C(2,4), D(-8,-1) as consecutive vertices.<BR>\n" );
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document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( " A   B   C   D   A\r\n" );
document.write( " 5   4   2  -8   5\r\n" );
document.write( " 2   3   4  -1   2\r\n" );
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document.write( "Add the diagonal products starting at the upper left:<BR>\n" );
document.write( "5*3 + 4*4 + 2*-1 + -8*2 = 15 + 16 - 2 - 16 = 13<BR>\n" );
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document.write( "Add the diagonal products starting at the lower left:<BR>\n" );
document.write( "2*4 + 3*2 + 4*-8 + -1*5 = 8 + 6 -32 - 5 = -23<BR>\n" );
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document.write( "The difference between the sums is 36.<BR>\n" );
document.write( "1/2 of 36 is the area<BR>\n" );
document.write( "Area = 18 sq units\r<BR>\n" );
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