Difference between revisions of "Perimeter"

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== Definition ==
 
== Definition ==
  
The '''perimeter''' of a geometric figure is the distance around the edge of the figure. Perimeter is often denoted by P. The perimeter of a [[circle]] is called its circumference.
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The '''perimeter''' of a geometric figure is the distance around the [[edge]] of the figure. Perimeter is often denoted by P. The perimeter of a [[circle]] is called its [[circumference]].
  
 
== Formulas ==
 
== Formulas ==
  
* Square - 4s, where s is the side length
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* Square: <math>4s</math>, where <math>s</math> is the side length.
  
* Rectangle - 2(l+w), where l is the length and w is the width
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* Rectangle: <math>2(l+w)</math>, where <math>l</math> is the length and <math>w</math> is the width.
  
* Circle - <math>2\pi r</math>, where r is the radius
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* Circle - <math>2\pi r</math>, where <math>r</math> is the [[radius]].
 
 
* Regular geometric figure with n sides - ns, where s is the length of the side
 
  
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* [[Regular polygon | Regular]] geometric figure 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 01:51, 31 October 2006

Definition

The perimeter of a geometric figure is the distance around the edge of the figure. Perimeter is often denoted by P. The perimeter of a circle is called its circumference.

Formulas

  • Square: $4s$, where $s$ is the side length.
  • Rectangle: $2(l+w)$, where $l$ is the length and $w$ is the width.
  • Circle - $2\pi r$, where $r$ is the radius.
  • Regular geometric figure with $n$ sides: $ns$, where $s$ is the side length.

Introductory Example Problems