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* Diagonals intersect at [[right angle]]s |
* Diagonals intersect at [[right angle]]s |
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| + | ===Area=== |
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| + | <math>A= a^2\sqrt{1-cos^2(\theta)}</math> |
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[[Category:Quadrilaterals]] |
[[Category:Quadrilaterals]] |
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Revision as of 18:41, 14 August 2009
In geometry, a rhombus is a quadrilateral whose four sides are of equal length. It is a special case of the parallelogram; a rhombus with right angles is a square.
Rhombi hold the following properties:
- All four sides are of equal length (congruent)
- Opposite sides are parallel to one another
- Parallelogram
- Opposite angles are of equal measure (congruent)
- Adjacent angles are supplementary to one another
- Diagonals bisect the angles of the corners they connect
- Diagonals bisect one another
- Diagonals intersect at right angles
Area
