document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1101896>Question 1101896</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given A (-3, 2), B (2, 7) and C (8, 10), find the area of the triangle ABC. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #716532 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=716532\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given A (-3,2), B (2,7) and C (8,10), find the area of the triangle ABC.<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   A\r\n" );
document.write( "-3   2   8  -3\r\n" );
document.write( " 2   7  10   2\r\n" );
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document.write( "Add the diagaonal products starting upper left.<BR>\n" );
document.write( "-3*7 + 2*10 + 8*2 = 15<BR>\n" );
document.write( "Add the diagaonal products starting lower left.<BR>\n" );
document.write( "2*2 + 7*8 -3*10 = 30<BR>\n" );
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document.write( "The difference is 15.<BR>\n" );
document.write( "The area is 1/2 that = 7.5 sq units<BR>\n" );
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document.write( "Works for all polygons, any # of sides.<BR>\n" );
document.write( "The points have to be in order around the polygon. </SPAN>\n" );
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