# Calculate, Compare and Estimate the Area of Rectangles

In this worksheet, students will be asked to calculate and compare the area of rectangles. They will also estimate the area of some irregular shapes.

Key stage:  KS 2

Curriculum topic:   Measurement

Curriculum subtopic:   Calculate/Estimate Areas

Difficulty level:

#### Worksheet Overview

The area of a 2D shape refers to the amount of space it takes up.

The area of a shape is measured in square units, usually cm² or m²

In this activity, you will be asked to calculate and compare the area of rectangles.

These will ether be cm² or m² (not to scale)

Let's go!

Let's find the area of the shape below.

Each square is 1 cm² (not to scale)

To find the area we multiply the length (l) by the width (w).

The length is 4 cm and the width is 7 cm.

4 x 7 = 28 (l x w)

The unit of measure is cm², so the area is written as 28 cm²

Now let's compare some areas.

Which shape has the greatest area?

Each square is 1 cm² (not to scale)

Remember that we multiply the length by the width.

Yellow = 7 x 6 = 42 cm²

Blue = 11 x 4 = 44 cm²

The blue rectangle has the greatest area.

One more to look at before you have a go!

Let's work out the area of this compound shape.

Each square is 1 cm²

We can see that the shape has been divided into two rectangles (a square is actually a special type of rectangle)

To calculate the area, we simply find the area of each rectangle and then add them together.

Blue = 3 x 9 = 27 cm²

Yellow = 4 x 4 = 16 cm²

27 + 16 = 43 cm²

The total area is 43 cm²

Do you feel ready to tackle some questions now?

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