Vertices of a triangle are `A(3, 1, 2), B(1, -1, 2)` and `C(2, 1, 1)`. Area of the triangle will be :

The vertices of a triangle are A(1, 3, 2), B(2, -1, 3) and C(-1, 4, 2). Find the angle A.

The vertices of a Delta ABC are A (2, 3, 1), B (-2, 2, 0) and C(0, 1, -1) . What is the area of the triangle?

Find the area of a triangle with vertices A(2,3,1),B(1,1,2) and C(1,2,1).

Find the area of the triangle with vertices A(1, 1, 2), B(2, 3, 5) and C(1, 5, 5).

Find the area of the triangle with vertices A(1, 1, 2), B(2, 3, 5) and C(1, 5, 5).

Consider the triangle ABC with vertices A(1,1,1), B(1,2,3) and C(2,3,1).Hence find the area of the triangle.

Find the area of the triangle with vertices A(3,-1,2),B(1,-1,-3) and C(4,-3,1) .

The area of the triangle whose vertices are A (1,-1,2), B (2, 1, -1) and C ( 3, -1, 2) is