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.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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

Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Dance