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A [[polygon]] of four sides. Each pair of opposite sides is of equal length. However, the adjacent sides do not need to be of equal length. The adjacent sides also are perpendicular. A specific case is the [[square]].
A [[polygon]] of four sides where every angle is a right angle (90°)<ref>There are many definitions of ''rectangle'', but it seems sensible to use one which ais based on [[angle]] properites reather than length or papallesim properties. Definition adapted from http://www.mathsisfun.com/definitions/rectangle.html </ref>.
As a result of this defintion:
* Each pair of opposite sides is of equal length.
* Opposite sides are parallel
* Diagonal are equal
* Adjacent sides are perpendicular
However, the adjacent sides do not need to be of equal length.
A specific case of a rectangle is is the [[square]], which is also a [[rhombus]].
===Notes===
<references/>
[[Image:Rectangle.gif]]
[[Image:Rectangle.gif]]
[[category:geometry]]
[[category:geometry]]