Editing Spherical cap (section)

{{short description|Section of a sphere}}
[[File:Spherical cap diagram.tiff|thumb|An example of a spherical cap in blue (and another in red)]]

In [[geometry]], a '''spherical cap''' or '''spherical dome''' is a portion of a [[sphere]] or of a [[ball (mathematics)|ball]] cut off by a [[plane (mathematics)|plane]]. It is also a [[spherical segment]] of one base, i.e., bounded by a single plane. If the plane passes through the [[center (geometry)|center]] of the sphere (forming a [[great circle]]), so that the height of the cap is equal to the [[radius]] of the sphere, the spherical cap is called a ''[[Sphere#Hemisphere|hemisphere]]''.