Difference between revisions of "Rectangle"
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| − | A [[polygon]] of four sides. | + | 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: | ||
| + | * Each pair of opposite sides is of equal length. | ||
| + | * Opposite sides are parallel | ||
| + | * Diagonals are equal | ||
| + | * Adjacent sides are perpendicular | ||
| + | * Area = product of any two adjacent sides | ||
| + | |||
| + | 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]]. | ||
| + | |||
| + | ==Notes== | ||
| + | <references/> | ||
| + | |||
| + | [[Category:Plane Geometry]] | ||
Latest revision as of 18:15, July 13, 2016
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
- Area = product of any two adjacent sides
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.
Notes
- â 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