Shape and symmetry: To identify acute and obtuse angles

In this lesson, you will recap on the names of different types of angles. We will be looking specifically at acute and obtuse angles today and exploring where they can be found. We will learn what makes an angle acute or obtuse and how they are different. We will learn to estimate and order angles and how to draw examples of both acute and obtuse angles, using the knowledge we have. We will practise with accuracy and precision when drawing angles.

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.

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

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.

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.

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.

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

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.

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

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:
Jog

On the spot:
Chair yoga