# Area of similar shapes

In this lesson, we will identify similar shapes and subsequently work out areas of similar shapes using our knowledge of scale factors.

#### 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.Fill in the gap: in two similar shapes, all corresponding _____ are equal.

1/5

Q2.Triangles DEF and GHI are similar. What is the scale factor of enlargement if GHI is the object and DEF is the image?

2/5

Q3.Triangles DEF and GHI are similar. What is the scale factor of enlargement if DEF is the object and GHI is the image?

3/5

Q4.Are PQR and SPR similar?

4/5

Q5.Are triangles PQS and SQR similar?

5/5

#### 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.Fill in the gap: in two similar shapes, all corresponding _____ are equal.

1/5

Q2.Triangles DEF and GHI are similar. What is the scale factor of enlargement if GHI is the object and DEF is the image?

2/5

Q3.Triangles DEF and GHI are similar. What is the scale factor of enlargement if DEF is the object and GHI is the image?

3/5

Q4.Are PQR and SPR similar?

4/5

Q5.Are triangles PQS and SQR similar?

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.

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

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

# Area of similar shapes quiz

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

Q1.The two rectangles below are similar. What is the scale factor of enlargement if the object is on the left and the image on the right?

1/5

Q2.The two rectangles below are similar. What is the scale factor for the area if the object is on the left and the image on the right?

2/5

Q3.The two rectangles below are similar. What is the scale factor of enlargement if the object is on the right and the image on the left?

3/5

Q4.The two rectangles below are similar. What is the scale factor for the area if the object is on the right and the image on the left?

4/5

Q5.Fill in the gap: to find the area scale factor, you must ______ the scale factor of enlargement.

5/5

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

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

# Area of similar shapes quiz

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

Q1.The two rectangles below are similar. What is the scale factor of enlargement if the object is on the left and the image on the right?

1/5

Q2.The two rectangles below are similar. What is the scale factor for the area if the object is on the left and the image on the right?

2/5

Q3.The two rectangles below are similar. What is the scale factor of enlargement if the object is on the right and the image on the left?

3/5

Q4.The two rectangles below are similar. What is the scale factor for the area if the object is on the right and the image on the left?

4/5

Q5.Fill in the gap: to find the area scale factor, you must ______ the scale factor of enlargement.

5/5

# Lesson summary: Area of similar shapes

## 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:
Dance