# Finding the Perimeter of a Polygon.

I like to think of Perimeter as walking around a fence. It is defined as the area around the outside of a polygon. If I walk around a yard with a fence, how far am I going to walk? This is how I always remembered how to determine the perimeter.

Let us try it:

We can see that we have a quadrilateral. This shape has two different four lines, two of them being different. We have two lines that measure 20 M and two lines that measure 7 M in length. To calculate the perimeter, we add the lengths of each line. 7 + 20 +7 +20 = 54 M. The perimeter of this quadrilateral is 54 meters.

Check out Mr. Derek Lidstone‘s notes on Area, Volume and Perimeter here:

Maths 6 Study Notes for Perimeter Area Volume