Perimeter
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 
