The area of the triangle with vertices (1,2,3), (2,5,-1), (-1,1,2) is

Assertion (A): The area of the triangle with vertices (1,2,3), (2, 5, -1) and (-1, 1, 2) is (1)/(2) sqrt155 sq units. Reason (R ): The area of the triangle with vertices vec(a), vec(b), vec(c ) is (1)/(2) |vec(a) xx vec(b) + vec(b) xx vec(c ) + vec(c ) xx vec(a)| Which of the following is correct ?

What is the area of the triangle with vertices (1, 2, 3), (2, 5, -1) and (-1, 1, 2) ?

Find the area of the triangle with vertices A(1,12), B(2,3,5), C(1,5,5)

the area of triangle whose vertices are (1,2,3),(2,5-1) and (-1,1,2) is

The area of triangle whose vertices are (1,2,3), (2,5,-1) and (-1,1,2) is

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

P(x, y) moves such that the area of the triangle with vertices at P(x, y), (1, -2), (-1, 3) is equal to the area of the triangle with vertices at P(x, y), (2, -1), (3, 1). The locus of P is

Using vectors, find the area of the triangle with vertices are A(1,2,3), B(2, -1, 4) and C(4,5,-1).

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