# 2D and 3D Shapes: To Classify Triangles

In this lesson, we will classify different types of triangles based on their mathematical properties.

#### 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.There is a right angle at every vertex.

1/4

Q2.It has only one pair of parallel lines.

2/4

Q3.It is a regular shape.

3/4

Q4.It is not a polygon.

4/4

#### 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.There is a right angle at every vertex.

1/4

Q2.It has only one pair of parallel lines.

2/4

Q3.It is a regular shape.

3/4

Q4.It is not a polygon.

4/4

# 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:

# To Classify Triangles Quiz

Use all your knowledge and skills from the lesson to decide which type of triangle is being described.

Q1.True or false: In equilateral triangles, all three angles are equal.

1/3

Q2.The perimeter of a equilateral triangle is 45cm. What is the length of one side?

2/3

Q3.True or false: Two sides of a scalene triangle can be equal.

3/3

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

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

# To Classify Triangles Quiz

Use all your knowledge and skills from the lesson to decide which type of triangle is being described.

Q1.True or false: In equilateral triangles, all three angles are equal.

1/3

Q2.The perimeter of a equilateral triangle is 45cm. What is the length of one side?

2/3

Q3.True or false: Two sides of a scalene triangle can be equal.

3/3

# Lesson summary: 2D and 3D Shapes: To Classify Triangles

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Chair yoga