# Categorising and defining polygons

In this lesson, we will learn about the key terminology involved in describing polygons, and begin to categorise polygons, based on certain properties.

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 total sum of the interior angles in a triangle is...

1/5

Q2.A right angled triangle with one angle as 23 degrees would mean the remaining interior angle would be...

2/5

Q3.In an equilateral triangle, each interior angle would be equal to...

3/5

Q4.If a base angle of an isosceles triangle was 34 degrees, what would the other base angle be?

4/5

Q5.If the base angles of an isosceles triangle were 34 degrees, what would the unknown angle be?

5/5

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 total sum of the interior angles in a triangle is...

1/5

Q2.A right angled triangle with one angle as 23 degrees would mean the remaining interior angle would be...

2/5

Q3.In an equilateral triangle, each interior angle would be equal to...

3/5

Q4.If a base angle of an isosceles triangle was 34 degrees, what would the other base angle be?

4/5

Q5.If the base angles of an isosceles triangle were 34 degrees, what would the unknown angle 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.

Quiz:

# Categorising and defining polygons

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

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

Quiz:

# Categorising and defining polygons

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

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

# Lesson summary: Categorising and defining polygons

## 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