Changes

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>.

A '''rectangle''' is 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 is based on [[angle]] properties rather than length or parallelism properties. Definition adapted from http://www.mathsisfun.com/definitions/rectangle.html</ref>

[[Image:Rectangle.gif]]

[[Image:Rectangle.gif]]

As a result of this defintion:

 

As a result of this definition:

* Each pair of opposite sides is of equal length.

* Each pair of opposite sides is of equal length.

* Opposite sides are parallel

* Opposite sides are parallel

* Diagonal are equal

* Diagonals are equal

* Adjacent sides are perpendicular

* Adjacent sides are perpendicular

However, the adjacent sides do not need to be of equal length.

Please note that the adjacent sides may or may not be of equal length. The special case where all four sides of a rectangle are equal is called a [[square]], which is also a [[rhombus]] and a [[kite]].

 

A specific case of a rectangle is is the [[square]], which is also a [[rhombus]].

 

===Notes===

==Notes==

<references/>

<references/>

 

[[Category:Plane Geometry]]

[[category:geometry]]