Editing Ball (mathematics) (section)

==Regions==
{{see also|Sphere#Regions{{!}}Spherical regions}}
A number of special regions can be defined for a ball:
*''[[spherical cap|cap]]'', bounded by one plane
*''[[spherical sector|sector]]'', bounded by a conical boundary with apex at the center of the sphere
*''[[spherical segment|segment]]'', bounded by a pair of parallel planes
*''[[spherical shell|shell]]'', bounded by two concentric spheres of differing radii
*''[[spherical wedge|wedge]]'', bounded by two planes passing through a sphere center and the surface of the sphere