Area of similar shapes

In this lesson, you will work out areas of similar shapes.

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!

Question 1

Question 2

Question 3

Question 4

Question 5

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

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!

Question 1

Question 2

Question 3

Question 4

Question 5

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.

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:

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.

Question 1

Question 2

Question 3

Question 4

Question 5

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

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:

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.

Question 1

Question 2

Question 3

Question 4

Question 5

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

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This was the final lesson in the unit Similarity and enlargement.

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