Prove that the points (3,-2),(1,0),(-1,-2) and (1,-4) are concyclic.

Prove that the points (1,- 6), (5, 2), (7, 0) and (- 1,-4) are concyclic. Find the radius of the circle.

Prove that the points (1,2,3),(4,0,4),(-2,4,2) and (7,-2,5) are collinear.

Using section formula, prove that the three points (-2,3,5),(1,2,3) and (7,0,-1) are collinear.

Verify that the points (3, - 2, 4), (1, 0, - 2) and (-1,2, - 8) are collinear.

Points (1,-1),(2,-2),(4,-5) and (-3,-4)

Show that the four points (1, 0), (2,-7), (8, 1) and (9,- 6) are concyclic.

Show that the points A(1,3,2),B(-2,0,1) and C(4,6,3) are collinear.

Show that the points (1,-1,1),(2,3,1),(1,2,3) and (0,-2,3) are coplanar. Find the equation of the plane in which they lie.

Locate the points: (1,1),(1,2),(1,3),(1,4).

Prove that the points A (1,2,3), B(2,3,1) and C(3,1,2) are the vertices of an equilateral triangle.