Surface Area of a Sphere

Surface Area of a Sphere

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

Formula

A = 4*pi*(r^2), A: Surface area of a sphere, r: Radius of the sphere

A = 4πr2

A: Surface area of a sphere
r: Radius of the sphere

Example

Find the surface area of the given sphere. r = 6.

r = 6

So A = 4π⋅62.

62 = 36

4⋅36 = 144

So A = 144π.