Spheroid
A spheroid is an Ellipsoid
 | (1) |
and 
axes areequal, then | (2) |
 | (3) |
is the equatorial Radius and 
is the polar Radius. Here 
is the colatitude, so take
to express in terms of latitude. | (4) |
gives | (5) |
 | (6) |
 | (7) |
, the spheroid is Oblate. If 
, the spheroid is Prolate. If 
, the spheroid degenerates to a Sphere.See also Darwin-de Sitter Spheroid, Ellipsoid, Oblate Spheroid, Prolate Spheroid- Unit Circle
- Unit Disk
- Unit Fraction
- Unit Matrix
- Unit Point
- Unit Ring
- Unit Sphere
- Unit Square
- Unit Step
- Unit Vector
- Unity
- Univalent Function
- Univariate Function
- Univariate Polynomial
- Universal Graph
- Universal Statement
- Universal Turing Machine
- Unknot
- Unknotting Number
- Unless
- Unlesss
- Unmixed
- Unpoke Move
- Unsafe
- Unsolved Problem