PERIMETER

Perimeter is the measure around a closed figure.
To find the perimeter of a polygon, add the measures of all sides.
Perimeter is measured in linear units such as centimeter, decimeter, meter, kilometer, etc.

Formulas to find the perimeter of:

1. Square
P = S1 + S2 + S3 + S4 or P = 4s

2. Rectangle
a. P = l + w + l + w
b. P = 2l + 2w
c. P = 2(l + w)

3. Triangle
 P = S1 + S2 + S3

4. Rhombus
P = S1 + S2 + S3 = S4 or P = 4s

*P = Perimeter*
*S = Side*
*l = length*
*w = width*