# Circumference of a circle

In this lesson, we will learn about the relationship between the circumference and the 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.

#### Unit quizzes are being retired in August 2023

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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.What is the name of the green area?

1/5

Q2.What is the length of the diameter?

2/5

Q3.What is the length of the radius?

3/5

Q4.A _________ is a straight line outside a circle that touches one point of the circumference.

4/5

Q5.An __________ is part of the circumference of the circle

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.

#### 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.What is the name of the green area?

1/5

Q2.What is the length of the diameter?

2/5

Q3.What is the length of the radius?

3/5

Q4.A _________ is a straight line outside a circle that touches one point of the circumference.

4/5

Q5.An __________ is part of the circumference of the circle

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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Circumference 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.Approximately how many times bigger is a circumference than a diameter?

1/5

Q2.What is the circumference of this circle?

2/5

Q3.What is the circumference of this circle?

3/5

Q4.What is the value of the missing length if the circumference is 81 pi.

4/5

Q5.What is the value of the missing length if the circumference is 36 pi.

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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Circumference 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.Approximately how many times bigger is a circumference than a diameter?

1/5

Q2.What is the circumference of this circle?

2/5

Q3.What is the circumference of this circle?

3/5

Q4.What is the value of the missing length if the circumference is 81 pi.

4/5

Q5.What is the value of the missing length if the circumference is 36 pi.

5/5

# Lesson summary: Circumference of a circle

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## Time to move!

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

For 5 mins...

Move around:
Jog

On the spot:
Dance