`-8,-4,-2,-1,-(1)/(2),"…"`

Find the area of the triangle whose vertices are given below : (i) (-3,-4), (-2,-7), (-1,-9) (ii) (3,8),(-4,2), (5,1) (iii) (2,1), (3,2), (-1, 4)

Using elementary tansformations, find the inverse of the matrix A=[(8,4,3),(2,1,1),(1,2,2)]

Examine whether the following four points are collinear or not (4,7,8),(-1,-2,1),(2,3,4),(1,2,5) .

Using elementary transformations, find the inverse of the matrix: A = {:[(8,4,3),(2,1,1),(1,2,2)] and use it to solve the following system of equations: {:(8x+4y+3z=19),(2x+y+z=5),(x+2y+2z=7):}

Show that the points : (4, 7, 8), (2, 3, 4), (- 1, - 2, 1), (1, 2, 5) are the vertices of a parallelogram.

Show that the points (4,7,8),(2,3,4),(-1,-2,1) ,(1,2,5) are the vertices of a paralelogram.

Show that the points (4,7,8),(2,3,4),(-1,-2,1) ,(1,2,5) are the vertices of a paralelogram.

Show that the points (4,7,8),(2,3,4),(-1,-2,1),(1,2,5) are the vertices of a parallelogram,but not a rectangle.

Points (4, 7, 8), (2, 3, 4), (-1, -2, -1) and (1, 2, 3) represents which quadrilateral ?