document.write( "Question 1172986: Hi,
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\n" ); document.write( "\n" ); document.write( "Calculate the area of the triangle with the following vertices. Include the matrix with your work.
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\n" ); document.write( "(1) (0,-9), (3,-9), and (0,-2)
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\n" ); document.write( "\n" ); document.write( "(2) (-8, -2), (-1, -11), and (-1, -2)
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\n" ); document.write( "\n" ); document.write( "(3) (-5, 1), (2, 9), and (-5, 9) \n" ); document.write( "

Algebra.Com's Answer #798144 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "(1)  In case (1), the triangle is a right-angled triangle, as you can learn it,\r\n" );
document.write( "     looking at the points coordinates attentively.\r\n" );
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document.write( "     After this observation, the solution is OBVIOUS.\r\n" );
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document.write( "(3)  In case (3), the triangle is a right triangle, again, as you can learn it,\r\n" );
document.write( "     looking at the points coordinates attentively.\r\n" );
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document.write( "     After this observation, the solution is OBVIOUS, again.\r\n" );
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document.write( "(2)  In case (2),  you have one horizontal side of the length 7 and the altitude to this side of the length 9.\r\n" );
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document.write( "     So, you can easily calculate the area of this triangle, as well.\r\n" );
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