Find the Diameter or Radius when given the Circumference

In this lesson, we will find the diameter or radius of a circle when given the circumference. This lesson will involve rearranging the formula for the circumference of a circle.

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.Find the length of the circumference in terms of pi.

1/4

Q2.Find the length of the circumference to three significant figures.

2/4

Q3.Find the length of the circumference in terms of pi.

3/4

Q4.Find the length of the circumference to 3 significant figures.

4/4

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.Find the length of the circumference in terms of pi.

1/4

Q2.Find the length of the circumference to three significant figures.

2/4

Q3.Find the length of the circumference in terms of pi.

3/4

Q4.Find the length of the circumference to 3 significant figures.

4/4

Video

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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:

Find the Diameter or Radius when given the Circumference

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

Q1.Rearrange the formula that finds the circumference of a circle to make the ‘diameter’ the subject.

1/4

Q2.The circumference of a circle is 35πcm. What is length of the radius?

2/4

Q3.The circumference of this circle is 30cm. What is the diameter to 3 significant figures?

3/4

Q4.The circumference of this circle is 30cm. What is the radius to 3 significant figures?

4/4

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:

Find the Diameter or Radius when given the Circumference

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

Q1.Rearrange the formula that finds the circumference of a circle to make the ‘diameter’ the subject.

1/4

Q2.The circumference of a circle is 35πcm. What is length of the radius?

2/4

Q3.The circumference of this circle is 30cm. What is the diameter to 3 significant figures?

3/4

Q4.The circumference of this circle is 30cm. What is the radius to 3 significant figures?

4/4

Lesson summary: Find the Diameter or Radius when given the Circumference

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