# Find missing lengths in similar shapes which have sides overlapping

In this lesson, we will find missing side lengths for similar shapes which have side lengths overlapping

#### 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.The two shapes are similar. What is the scale factor of the enlargement?

1/3

Q2.These two shapes are similar, what is the length of side marked x?

2/3

Q3.These two shapes are similar, what is the length of side marked x?

3/3

#### 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.The two shapes are similar. What is the scale factor of the enlargement?

1/3

Q2.These two shapes are similar, what is the length of side marked x?

2/3

Q3.These two shapes are similar, what is the length of side marked x?

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.

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

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

# Find missing lengths in similar shapes which have sides overlapping

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

Q1.Triangle ABC is similar to triangle ADE. What is the length of side marked x? (not drawn to scale)

1/3

Q2.The diagram (not drawn to scale) shows two similar triangles. Work out the side length AD.

2/3

Q3.The diagram (not drawn to scale) shows two similar triangles. Work out the side length BD.

3/3

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

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

# Find missing lengths in similar shapes which have sides overlapping

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

Q1.Triangle ABC is similar to triangle ADE. What is the length of side marked x? (not drawn to scale)

1/3

Q2.The diagram (not drawn to scale) shows two similar triangles. Work out the side length AD.

2/3

Q3.The diagram (not drawn to scale) shows two similar triangles. Work out the side length BD.

3/3

# Lesson summary: Find missing lengths in similar shapes which have sides overlapping

## 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