Difference between revisions of "Rectangle"
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| − | 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 | + | 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]] | ||
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* 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 | ||
| − | * | + | * Diagonals are equal |
* Adjacent sides are perpendicular | * Adjacent sides are perpendicular | ||
However, the adjacent sides do not need to be of equal length. | However, the adjacent sides do not need to be of equal length. | ||
| − | A special case of a rectangle | + | A special case of a rectangle is the [[square]], which is also a [[rhombus]]. |
Revision as of 10:13, May 14, 2007
A rectangle is a polygon of four sides where every angle is a right angle (90°)[1].
As a result of this definition:
- Each pair of opposite sides is of equal length.
- Opposite sides are parallel
- Diagonals are equal
- Adjacent sides are perpendicular
However, the adjacent sides do not need to be of equal length.
A special case of a rectangle is the square, which is also a rhombus.
Notes
- ↑ 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