Show that the points `(7, 5), (6, -2), (-1, -1) and (0, 6)` are concyclic. Also find theradius and the centre of the circle on which they lie.

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

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

Show that the points ( 1,0),(2,-7) , (8,1) and (9,-6) 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 points (0,3),(-6,0),(-1,5) and (-4,-1) are concyclic.

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.

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

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

Show that the four point (4,6),(-3,5),(5,-1) and (1,7) are concyclic.

Show that the point (5,5),(6,4),(-2,4) and (7,1) are concylic.Hence find centre and radius of this circle.