document.write( "Question 1101896: Given A (-3, 2), B (2, 7) and C (8, 10), find the area of the triangle ABC. \n" ); document.write( "
Algebra.Com's Answer #716519 by richwmiller(17219)\"\" \"About 
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\n" ); document.write( "Alan,
\n" ); document.write( "What is this process called? What is the rational behind it?\r
\n" ); document.write( "\n" ); document.write( "x -3,2,8,-3
\n" ); document.write( "y 2,7,10,2
\n" ); document.write( "add
\n" ); document.write( "-3*7+2*10+8*2
\n" ); document.write( "-21+20+16=15
\n" ); document.write( "add
\n" ); document.write( "2*2+7*8+(10*-3)=30
\n" ); document.write( "4+56-30=30
\n" ); document.write( "subtract
\n" ); document.write( "15-30=-15
\n" ); document.write( "1/2*|-15|=7.5 sq units
\n" ); document.write( "\r
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