document.write( "Question 148413: \"A=1%2F2\"\"abs%28matrix%283%2C3%2Ca%2Cb%2C1%2Cc%2Cd%2C1%2Ce%2Cf%2C1%29%29\" \n" ); document.write( "
Algebra.Com's Answer #108913 by Edwin McCravy(20056)\"\" \"About 
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document.write( "That's the formula for the area of a triangle whose\r\n" );
document.write( "vertices are (a,b), (c,d), and (e,f) going around the\r\n" );
document.write( "triangle counter-clockwise.\r\n" );
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document.write( "Example:\r\n" );
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document.write( "Suppose we want to find the area of the triangle whose\r\n" );
document.write( "vertices are (4,3), (-5,7), (3,-6).   Those are in\r\n" );
document.write( "counter-clockwise order.\r\n" );
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document.write( "We just plug those corner points into the formula:\r\n" );
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document.write( "\"A=1%2F2\"\"abs%28matrix%283%2C3%2C4%2C3%2C1%2C-5%2C7%2C1%2C3%2C-6%2C1%29%29=%281%2F2%2985=+42.5\"\r\n" );
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document.write( "Edwin
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