Rhombus
A Quadrilateral with both pairs of opposite sides Parallel and all sides the same length, i.e., an equilateralParallelogram. The word Rhomb is sometimes used instead of rhombus, and a rhombus is sometimes also called adiamond. The Diagonals 
and 
of a rhombus are perpendicular and satisfy
The Area of a rhombus is given by
A rhombus whose Acute Angles are 45° is called a Lozenge.See also Diamond, Lozenge, Parallelogram, Quadrilateral, Rhombic Dodecahedron,Rhombic Icosahedron, Rhombic Triacontahedron, Rhomboid, Skew Quadrilateral, Trapezium, Trapezoid
References
Beyer, W. H. (Ed.) CRC Standard Mathematical Tables, 28th ed. Boca Raton, FL: CRC Press, p. 123, 1987.
- Geometrography
- Geometry
- Gergonne Line
- Gergonne Point
- Germain Primes
- Gerono Lemniscate
- Gersgorin Circle Theorem
- G-Function
- g-Function
- Ghost
- Gibbs Constant
- Gibbs Effect
- Gibbs Phenomenon
- Gigantic Prime
- Gilbrat's Distribution
- Gilbreath's Conjecture
- Gill's Method
- Gingerbreadman Map
- Girard's Spherical Excess Formula
- Girko's Circular Law
- Girth
- Giuga Number
- Giuga's Conjecture
- Giuga Sequence
- Glaisher-Kinkelin Constant