In this activity, we are going to be calculating the area and perimeter of rectangles using the information provided.

The** area **of a rectangle is its** length x width** (l x w).

The **perimeter **of a shape is the **total distance around the edge.**

**Area** is calculated in** m² or cm² **

Perimeter is usually measured in m or cm

Let's have a look at an example.

Here is a rectangle (not to scale):

If the area is 200 m² and the width is 20 m, what is the perimeter?

We can work out the area using this information.

We know the width is 20 m

We know the area is 200 m**²**

We know that area is l x w (a = l x w)

We can divide the area by the width to find the length (a ÷ w = l)

**200 ÷ 20 = 10**

**The length is 10 m**

The** perimeter **will be 20 + 20 + 10 + 10 = **60 m**

We can check this by multiplying 20 by 10 = 200

Top Tip: Read the information in each question carefully and use it to work out the answer. It can help to draw out the shape on paper.