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

The points (1, 1), (- 6, 0), (-2, 2). (-2,-8) are

Show that the points (2, 0), (5, -3), (2, -6) and (-1, -3) are concyclic, find the equation of the circle on which the points lie and the coordinates of the centre of the circle.

Answer the following: Show that the points (9,1),(7,9),(-2,12) and (6,10) are concyclic.

Show that the points (0,3),(-6,0),(-1,5) and (-4,-1) are concyclic.

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

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

Show that the points (9, 1), (7, 9), (-2, 12), (6, 10) are concyclic and find the equation of the circle on which they lie.

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

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

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