Difference between revisions of "Perimeter"
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* [[Square (geometry) | Square]]: <math>4s</math>, where <math>s</math> is the side length. <follows from rectangle> | * [[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]]. |
* [[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. | ||
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.
, where 
is the length and 
is the width.- Square:
, where 
is the side length. <follows from rectangle>
, where 
is the side length. <follows from rectangle>- Circle -
, where 
is the radius.
, where 
is the - Regular polygon with
sides: 
, where is the side length.
sides: 
, where - Polygon with
sides: 
, where 
are the lengths of the sides of the polygon.
sides: 
, where 
are the lengths of the sides of the polygon.
