rhombus

A rhombus (plural rhombi, or rhombuses)is a quadrilateral with its four sides equal.A square is a rhombus,but a rhombus need not be a square,since the angles need not all be equal.Every rhombus is, however, a parallelogram.

In any rhombus, the diagonals are always perpendicular.A nice result following from this,is that joining the midpoints of the sides, always gives a rectangle.

If $D$ and $d$ are the lengths of the diagonals,then the area of the rhombus is

$$\frac{Dd}{2}.$$

Title	rhombus
Canonical name	Rhombus
Date of creation	2013-03-22 12:02:38
Last modified on	2013-03-22 12:02:38
Owner	yark (2760)
Last modified by	yark (2760)
Numerical id	14
Author	yark (2760)
Entry type	Definition
Classification	msc 51-00
Related topic	Quadrilateral
Related topic	Parallelogram
Related topic	Rectangle
Related topic	Square
Related topic	ParallelogramLaw
Related topic	Kite
Defines	rhombi
Defines	rhombuses