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by vishubn » Fri Dec 26, 2008 1:58 am
2)

use the below formula

and solve u wil egt 12.5

triangle area
1/2 Abs [ (x1-x2)(y2-y3) - (y1-y2)(x2-x3) ]



1)https://www.beatthegmat.com/gmatprep-pra ... t1615.html

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by steveyb » Fri Dec 26, 2008 11:11 am
If you draw lines from the ends of each point to the axis you can draw a square that surrounds the triangle. This gives you 3 right triangles, with the distance of each side.

Find area of each triangle using 1/2 bh. (3.5, 6, 6)

Then find the area of the square (28)

Subtract total area of triangles from total area of square (28- 3.5 - 6 - 6) = 12.5
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