Fractions of a circle

In this lesson, we will learn how to calculate the arc length for fractions of circles.

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.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

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.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

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.

Quiz:

Fractions 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.If the diameter of a circle is 20. What is the circumference?

1/6

Q2.If the circumference of a circle is 14 pi. What is the radius?

2/6

Q3.What is the arc length for a?

3/6

Q4.What is the arc length for b?

4/6

Q5.What is the arc length for c?

5/6

Q6.What is the arc length for d?

6/6

Quiz:

Fractions 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.If the diameter of a circle is 20. What is the circumference?

1/6

Q2.If the circumference of a circle is 14 pi. What is the radius?

2/6

Q3.What is the arc length for a?

3/6

Q4.What is the arc length for b?

4/6

Q5.What is the arc length for c?

5/6

Q6.What is the arc length for d?

6/6

Lesson summary: Fractions of a circle

Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga