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  4. The area of the triangle formed by the points (2, 2), (5, 5), (6, 7) is equal to (in square units)

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Q. The area of the triangle formed by the points $(2, 2), (5, 5), (6, 7)$ is equal to (in square units)

KEAMKEAM 2010Straight Lines

Solution:

Required Area
$=\frac{1}{2}[2(5-7)+5(7-2)+6(2-5)] $
$=\frac{1}{2}[-4+25-18] $
$=\frac{3}{2}sq\text{ }unit $