Question

How do you find the radius of a sphere?

Answer 1

actually ignore that post

the general formula of a sphere is x^2 + y^2 + z^2 = r^2
that r is the radius

Answer 2

here is the general formula of a sphere when it is not centered in the origin and centered at point (a,b,c) instead

(x - a)^2 + (y - b)^2 + (z - c)2^ = r^2
and r is the radius