geometry
posted by SoccerStar .
Here is an equation for a sphere: (x18)^2+(y5)^2+(z+11)^2=36
give the coordinates of two points on the sphere.
I know how to find coordinates on a circle using the equation (xh)^2+(yk)^2=r^2 but I can't figure out how t do it with a sphere.

Well, you know the sphere has its center at (18,5,11) and has radius 6
So, how about points lying on the axes, as measured from the center?
(12,5,11) (24,5,11)
(18,1,11) (18,11,11)
(18,5,17) (18,5,5)