# 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  