Surface Area of a Sphere

The following is the formula for calculating the surface area of a sphere.

surface area of a sphere formula

Note that 4 and pi are constants. The formula can be approximated using the following formula:

If you know the surface area of a sphere it is possible to calculate the radius of the sphere by rearranging the surface area formula. This is the formula used to calculate a sphere’s radius from a known surface area:

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