Surface Area of a Sphere
The Greek mathematician Archimedes discovered that the surface area of a sphere is the same as the lateral surface area of a cylinder having the same radius as the sphere and a height the length of the diameter of the sphere.
The lateral surface area of the cylinder is where .
Lateral Surface Area of the Cylinder .
Therefore, the Surface Area of a Sphere with radius equals .
Find the surface area of a sphere with radius inches.