Sphere

A sphere is the three-dimensional analogue of a circle. As it has no edges or vertices, it is not a polyhedron. A radius is a line segment connecting any point on the sphere's surface to its center.

Volume of a Sphere
To find the volume of a sphere, you use the formula $$(V = (\dfrac{4}{3}){\pi}r^3)$$, where $$r$$ is the radius and $${\pi}$$ is rounded to 3.14.

Fun Facts

 * In Edwin Abbott's work Flatland: A Romance of Many Dimensions, a Sphere is used as an emmisary from the land of three dimensions ("Spaceland") to a two-dimensional world ("Flatland").  See Dimensions.