[" Show that the four points "(9,1)(7,9)(-2,12)(6,10)" are concyclic and find the "],[" equation of the circle "]

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.

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

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

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.

Show that the following four points in each jof the following are concyclic and find the equation of the circle on which they lie. (1,-6),(5,2),(7,0),(-1,-4)

Show that the following four points in each jof the following are concyclic and find the equation of the circle on which they lie. (1,2),(3,-4),(5,-6),(19,8)

Show that the following four points in each jof the following are concyclic and find the equation of the circle on which they lie. (1,1), (-6,0),(-2,2),(-2-8)1