# To identify lines of symmetry in 2-D shapes

In this lesson, we will revise the names of different types of 2D shapes. We will explore what symmetry is and how to recognise lines of symmetry in 2D shapes. We will develop strong mathematical language about shape and we will investigate lines of symmetry in a variety of quadrilaterals and triangles.

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.

#### 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.I have 4 sides. I have 4 right angles. Opposite sides are equal. Not all sides measure the same. What shape am I?

1/5

Q2.I am a triangle. All sides are a different length. One angle is 90° degrees. What kind of triangle am I?

2/5

Q3.I am a quadrilateral. I have no right angles. Opposite sides are parallel. What shape could I be?

3/5

Q4.How many sides do 5 quadrilaterals have altogether?

4/5

Q5.What do each of the angles in a rectangle measure?

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.

#### 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.I have 4 sides. I have 4 right angles. Opposite sides are equal. Not all sides measure the same. What shape am I?

1/5

Q2.I am a triangle. All sides are a different length. One angle is 90° degrees. What kind of triangle am I?

2/5

Q3.I am a quadrilateral. I have no right angles. Opposite sides are parallel. What shape could I be?

3/5

Q4.How many sides do 5 quadrilaterals have altogether?

4/5

Q5.What do each of the angles in a rectangle measure?

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.

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

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

# Plenary Quiz

What do you remember?

Q1.How many lines of symmetry does a square have?

1/5

Q2.Triangles have 3 lines of symmetry

2/5

Q3.Another name for a line of symmetry is....

3/5

Q4.How many lines of symmetry does a regular octagon have?

4/5

Q5.How many lines of symmetry does this shape have?

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.

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

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

# Plenary Quiz

What do you remember?

Q1.How many lines of symmetry does a square have?

1/5

Q2.Triangles have 3 lines of symmetry

2/5

Q3.Another name for a line of symmetry is....

3/5

Q4.How many lines of symmetry does a regular octagon have?

4/5

Q5.How many lines of symmetry does this shape have?

5/5

# Lesson summary: To identify lines of symmetry in 2-D shapes

## It looks like you have not completed one of the quizzes.

To share your results with your teacher please complete one of the quizzes.

## 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