Difference between revisions of "Perimeter"
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== Definition == | == Definition == | ||
| − | The '''perimeter''' of a geometric figure is the distance around the | + | 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 == | == Formulas == | ||
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* 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 | + | * [[Regular polygon]] with <math>n</math> sides: <math>ns</math>, where <math>s</math> is the side length. |
== 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 13:06, 1 November 2006
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
- Square:
, where 
is the side length.
, where 
is the side length.- Rectangle:
, where 
is the length and 
is the width.
, where 
is the length and 
is the width.- Circle -
, where 
is the radius.
, where 
is the - Regular polygon with
sides: 
, where is the side length.
sides: 
, where 
