Q. 205.0( 1 Vote )

Using vectors, fi

Answer :


A triangle with vertices A (1, 1, 2), B (2, 3, 5) and C (1, 5, 5)

Key Point: Area of a triangle (ΔABC) is given by – Area =

We are given with the coordinates, or we can say the P.V of points A, B and C.

We can say that –



Area of required triangle =

So, first, we find the magnitude of cross product and then we will apply the formula-


Expanding about 1st row –

|| =

Area of required triangle =

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