Sphere
Sphere
A 3D shape bounded by a set of points at an equal distance from a given point.
Properties
  1. It is 3D counterpart of a circle.
  2. All the points on the surface of a sphere are equidistant from the center.
  3. It is perfectly symmetrical.
Surface Area of Sphere (S)
S = 4 π r2
r: radius of the sphere
Volume of Sphere (V)
V =
4 3
π r3
r: radius of the sphere
Volume of Spherical Shell (Vshell)
Vshell =
4 3
π (R3 − r3)
R: outer radius, r: inner radius of the sphere