Show that the points `(3,2,2),(-1,1,3),(0,5,6),(2,1,2)` lie on a sphere whose centre is (1,3,4). Find its radius.

Show that the points (3,2,2),(-1,4,2),(0,5,6),(2,1,2) lie on a sphere whose centre is (1,3,4) Find the also its radius.

Show that the points (9, -2), (-5, 12) and (-7, 10) lie on that circle whose centre is the point (1, 4)

Find the equation of a sphere whose centre is (3, 1, 2) and radius is 5.

Find the equation of a sphere whose centre is (3,1,2) radius is 5.

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

Show that the points (3,-1,-1),(5,-4,0),(2,3,-2) and (0,6,-3) are the vertices of a parallelogram

Show that the points (5, 5), (6, 4), (-2, 4) and (7, 1) , all lie on a circle. Find its equation, centre and radius.

Show that the points (3,-1,-1),(5,-4,0) ,(2,3,-2) and (0,6,-3) are the vertices of a parallelogram

Show that the point (3,-1,-1), (5,-4,0), (2,3,-2) and (0,6,-3) are the vertices of a parallelogram.