# Find the length of an arc and the perimeter of a sector

In this lesson, we will find the length of an arc and the perimeter of a semicircle

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 arc length of the semi circle in terms of π ?

1/3

Q2.What is the arc length of the quarter circle to 3 significant figures?

2/3

Q3.What is the arc length of the semicircle to 3 significant figures?

3/3

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 arc length of the semi circle in terms of π ?

1/3

Q2.What is the arc length of the quarter circle to 3 significant figures?

2/3

Q3.What is the arc length of the semicircle to 3 significant figures?

3/3

# 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:

# Find the length of an arc and the perimeter of a sector

Find the length of an arc and the perimeter of a sector

Q1.What is the arc length of the sector to 3 significant figures?

1/3

Q2.What is the perimeter of the sector to 3 significant figures?

2/3

Q3.What is the arc length of the sector to 3 significant figures?

3/3

Quiz:

# Find the length of an arc and the perimeter of a sector

Find the length of an arc and the perimeter of a sector

Q1.What is the arc length of the sector to 3 significant figures?

1/3

Q2.What is the perimeter of the sector to 3 significant figures?

2/3

Q3.What is the arc length of the sector to 3 significant figures?

3/3

# Lesson summary: Find the length of an arc and the perimeter of a sector

## 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