# Source the Perimeter Formula you require Quickly and Efficiently

Perimeter Formula Lists are few and far between on the internet. Sometimes you just want the area formula for a number of different shapes.  And that is what I offer you here.  So no more hopping around from one page to another - they are all here for you.

I also have a similar page offering:

Surface Area Formula  and

Volume Formulas

However, should you want a number of different formula for one particular shape - then please visit our geometry formula page, where you will find an alphabetical listing of all the shapes the elementary math student studies.

## Perimeter Formula

Acute Triangle

Circle

Decagon

Equilateral Triangle

Hexagon

Isosceles Trapezoid

Isosceles Triangle

Kite

Let a = Length of short side

Let b = Length of long side

Perimeter = 2(a + b)

Obtuse Triangle

Octagon

Parallelogram

Let a = Length of short side

Let b = Length of long side

Perimeter = 2(a + b)

Pentagon

Rectangle

Let a = Length of short side

Let b = Length of long side

Perimeter = 2(a + b)

Rhombus

Right Triangle

Scalene Triangle

Septagon

Square

Trapezoid