document.write( "Question 1045419: find the area of a triangle with the vertices ( 7.-9), (-1,6),(-1,-9) \n" ); document.write( "

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\n" ); document.write( "find the area of a triangle with the vertices ( 7.-9), (-1,6),(-1,-9)
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Let points (7, - 9), (- 1, 6), and (- 1, - 9) be A, B, and C, respectively
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document.write( "We then have: A(7, - 9), B(- 1, 6), C(- 1, - 9)
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document.write( "Line AC is parallel to the x-axis, and so, its length is: 7 - - 1, or 7 + 1, or 8 units
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document.write( "Line BC is parallel to the y-axis, and so, its length is: 6 - - 9, or 6 + 9, or 15 units
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document.write( "We now see that the polygon is a right-triangle, and that AC and BC are its legs. 
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document.write( "Therefore, area = , or  \n" );
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