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Given
A triangle.
with vertices at (−2, 1) , (2, 1) , and (3, 4)
Find out the area of a triangle.
To proof
Formula
As given the vertices at (−2, 1) , (2, 1) , and (3, 4)
put in the above equation
we get
solving
thus
area of the triangle is 6 units².
Hence proved