Changes

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>.

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 definition:

As a result of this definition:

* Diagonals 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 special case of a rectangle is the [[square]], which is also a [[rhombus]].

 

===Notes===

==Notes==

<references/>

<references/>

 

[[Category:Plane Geometry]]

[[category:geometry]]