Sphere: Surface Area

How to find the surface area of a sphere: formula, 1 example, and its solution.

Formula

Formula

A = 4πr2

A: Surface area of a sphere
r: Radius

Example

Example

Solution

r = 6

Then A = 4⋅π⋅62.

62 = 36

4⋅36 = 144

So the surface area of the sphere is 144π.