# Volume of an ellipsoid

## Description

An ellipsoid is a closed quadric surface that is a three dimensional analogue of an ellipse.a, b, c.are called the semi-principal axes.They correspond to the semi-major axis and semi-minor axis of the appropriate ellipses.

There are four distinct cases of which one is degenerate:
a>b>c — tri-axial or (rarely) scalene ellipsoid;
a=b>c — oblate ellipsoid of revolution (oblate spheroid);
a=b<c — prolate ellipsoid of revolution (prolate spheroid);
a=b=c — the degenerate case of a sphere;

The volume of the internal part of the ellipsoid can be calculated by the semi-principal axes a,b,c.

## Variables

V_{ellipsoid} | Volume of an ellipsoid (m^{3}) |

π | pi |

a | semi-principal axis (m) |

b | semi-principal axis (m) |

c | semi-principal axis (m) |