Difference between revisions of "Perimeter"
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== Formulas == | == Formulas == | ||
− | * [[ | + | * [[Rectangle]]: <math>2(l+w)</math>, where <math>l</math> is the length and <math>w</math> is the width. |
− | * [[ | + | * [[Square (geometry) | Square]]: <math>4s</math>, where <math>s</math> is the side length. <follows from rectangle> |
− | * Circle - <math>2\pi r</math>, where <math>r</math> is the [[radius]]. | + | * [[Circle]] - <math>2\pi r</math>, where <math>r</math> is the [[radius]]. |
* [[Regular polygon]] with <math>n</math> sides: <math>ns</math>, where <math>s</math> is the side length. | * [[Regular polygon]] with <math>n</math> sides: <math>ns</math>, where <math>s</math> is the side length. | ||
+ | |||
+ | * [[Polygon]] with <math>q</math> sides: <math>\sum_{z=1}^{q} a_z</math>, where <math>a_i</math> are the lengths of the sides of the polygon. | ||
== Introductory Example Problems == | == Introductory Example Problems == | ||
* [[2006_AMC_10B_Problems/Problem_6 | 2006 AMC 10B Problem 6]] | * [[2006_AMC_10B_Problems/Problem_6 | 2006 AMC 10B Problem 6]] |
Revision as of 09:25, 6 November 2007
Definition
The perimeter of a geometric figure is the distance around the outside of the figure. Perimeter is often denoted by P. The perimeter of a circle is called its circumference.
Formulas
- Rectangle: , where is the length and is the width.
- Square: , where is the side length. <follows from rectangle>
- Regular polygon with sides: , where is the side length.
- Polygon with sides: , where are the lengths of the sides of the polygon.