Let's look at the geometric characteristics of a sphere. But first, please review the definition of Surface Area Of Three-Dimensional Shapes.

- A sphere has a very unique feature, all points on the surface
of the sphere are equal distance from the center of the sphere; or said another
way, the distance from the center of a sphere to the surface is equal to the length of the
**Radius**. - Special note, the radius of a sphere must be greater than zero.

**Surface Area Of A Sphere Formula**

Formula = 4 × π × Radius^{2} =

Formula = 4 × π × r^{2} =

Formula = 4πr^{2}