Find the Area of a Circle

In this lesson, we will investigate how to find the area of a circle. We will practise finding the area of circles and semicircles when given either the radius or the diameter.

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.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

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.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

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

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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.

Quiz:

Find the 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.Find the area of the circle in terms of π.

1/4

Q2.Find the area of the circle to three significant figures.

2/4

Q3.Find the area of the circle to 3 significant figures.

3/4

Q4.Find the area in terms of π.

4/4

Quiz:

Find the 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.Find the area of the circle in terms of π.

1/4

Q2.Find the area of the circle to three significant figures.

2/4

Q3.Find the area of the circle to 3 significant figures.

3/4

Q4.Find the area in terms of π.

4/4

Lesson summary: Find the Area of a Circle

Time to move!

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