Sphere - a three dimensional geometrical figure, the sphere is perfectly round. Similarly to the circle, only in 3 dimensions, it is defined by all points that are in the same distance from any given point. The name comes from the greek word σφαῖρα (sphaira), that means globe or ball.
|d = 2 * r|
|Surface Area (SA) = 4 * π * r²|
|Volume (V) =||4 * π * r³|