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Perimeter and area of a polygon

What is the **perimeter** of a **polygon**? And what is the **area**?

Learn definitions and how to measure the perimeters and the areas.

What is the **perimeter** of a **polygon**? And what is the **area of a polygon**?

Learn definitions and how to measure the perimeters and the areas of all the polygons that you know!

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Table of contents of this lesson: Perimeter and area of a polygon

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Learn FREE with videos and interactive exercises

What is the **area** of a polygon? The area **expresses the extent of a polygon**.

An area is a **two-dimensional quantity**: to calculate the area, use a shape as "unit of measurement" and look how many of it fill the shape you are analysing. Depending on the unit of measurement that you choose, you will have different results.

## The perimeter of polygons

What is the **perimeter** of a shape or a polygon? The perimeter is the **length of the outline of a polygon**.

The perimeter of a polygon is the **sum of all the sides of a polygon**.

## Let's measure the perimeter

The perimeter is a **length**, so you always have to remember to use a **unit of measurement**.

The length (or distance) measures the **quantity of a dimension**.