# Shape and symmetry: To identify acute and obtuse angles

In this lesson, we will recap the names of different types of angles. We will look specifically at acute and obtuse angles and explore where they can be found. We will learn what makes an angle acute or obtuse and how they are different.

#### 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.How many right angles does this shape contain?

1/5

Q2.How many right angles does this shape contain?

2/5

Q3.Which of these shapes contains at least 1 right angle?

3/5

Q4.How many degrees in 3 right angles?

4/5

Q5.Estimate this angle. Which guess is closest?

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.How many right angles does this shape contain?

1/5

Q2.How many right angles does this shape contain?

2/5

Q3.Which of these shapes contains at least 1 right angle?

3/5

Q4.How many degrees in 3 right angles?

4/5

Q5.Estimate this angle. Which guess is closest?

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:

# To identify acute and obtuse angles

What do you remember?

Q1.What kind of angle is MORE than 90° but LESS than 180°

1/5

Q2.How many degrees in 2 right angles?

2/5

Q3.How many degrees on a straight line?

3/5

Q4.Which answer is the closest estimate for the following angle?

4/5

Q5.What kind of angle is 30°?

5/5

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

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

# To identify acute and obtuse angles

What do you remember?

Q1.What kind of angle is MORE than 90° but LESS than 180°

1/5

Q2.How many degrees in 2 right angles?

2/5

Q3.How many degrees on a straight line?

3/5

Q4.Which answer is the closest estimate for the following angle?

4/5

Q5.What kind of angle is 30°?

5/5

# Lesson summary: Shape and symmetry: To identify acute and obtuse angles

## 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