# Building shapes from triangles (Part 1)

In this lesson, we will learn how to arrange triangles to form polygons as part of an investigation into the internal angles of polygons. This represents part 1 of a two-part lesson.

#### 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.Which of the following statements most accurately describes an 'obtuse angle'?

1/5

Q2.Which of the following statements most accurately describes an 'acute angle'?

2/5

Q3.Which of the following statements most accurately describes a 'regular polygon'

3/5

Q4.A rhombus is an example of a...

4/5

Q5.Another word for a regular quadrilateral would be...

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.Which of the following statements most accurately describes an 'obtuse angle'?

1/5

Q2.Which of the following statements most accurately describes an 'acute angle'?

2/5

Q3.Which of the following statements most accurately describes a 'regular polygon'

3/5

Q4.A rhombus is an example of a...

4/5

Q5.Another word for a regular quadrilateral would be...

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:

# Building shapes from triangles (Part I)

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

Q1.Each angle in an equilateral triangle is...

1/5

Q2.Which of the following statements most accurately describes an 'acute angle'?

2/5

Q3.The total interior angles in a quadrilateral sum to...

3/5

Q4.If I wanted to describe a regular triangle, it would be better to say which of the following?

4/5

Q5.If you were to have 6 separate equilateral triangles , what would the total interior angles of all the triangles sum to?

5/5

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

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

# Building shapes from triangles (Part I)

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

Q1.Each angle in an equilateral triangle is...

1/5

Q2.Which of the following statements most accurately describes an 'acute angle'?

2/5

Q3.The total interior angles in a quadrilateral sum to...

3/5

Q4.If I wanted to describe a regular triangle, it would be better to say which of the following?

4/5

Q5.If you were to have 6 separate equilateral triangles , what would the total interior angles of all the triangles sum to?

5/5

# Lesson summary: Building shapes from triangles (Part 1)

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga