# Area of a circle

In this lesson, we will learn to calculate the area of a circle using a radius or diameter. We will also learn how to work backwards from the area of a circle to determine the radius and diameter.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Pi is approximately...

1/5

Q2.If a circle has radius 5, then the circumference is approximately...

2/5

Q3.Find the perimeter of a.

3/5

Q4.Find the perimeter of b.

4/5

Q5.Find the perimeter of c.

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Pi is approximately...

1/5

Q2.If a circle has radius 5, then the circumference is approximately...

2/5

Q3.Find the perimeter of a.

3/5

Q4.Find the perimeter of b.

4/5

Q5.Find the perimeter of c.

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

# Area of a circle

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What is the area of circle a?

1/5

Q2.What is the area of circle b?

2/5

Q3.What is the area of circle c?

3/5

Q4.What is the area of a circle with radius of 12?

4/5

Q5.What is the area of a circle with a diameter of 6?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

# Area of a circle

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.What is the area of circle a?

1/5

Q2.What is the area of circle b?

2/5

Q3.What is the area of circle c?

3/5

Q4.What is the area of a circle with radius of 12?

4/5

Q5.What is the area of a circle with a diameter of 6?

5/5

# Lesson summary: Area of a circle

## It looks like you have not completed one of the quizzes.

To share your results with your teacher please complete one of the quizzes.

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga