Recognise acute and obtuse angles

In this lesson we will learn to recognise acute and obtuse angles and shapes, then draw them on paper.

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Q1.REVIEW: An angle is formed when two lines meet

1/7

Q2.How big is a right angle?

2/7

Q3.Does this shape have a right angle inside it?

3/7

Q4.Which shapes have a right angle (tick 2)

4/7

Q5.How many right angles are there inside a square?

5/7

Q6.Which angle is a right angle?

6/7

Q7.Which angles are right angles (tick 2)

Select two (2) boxes

7/7

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!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Q1.REVIEW: An angle is formed when two lines meet

1/7

Q2.How big is a right angle?

2/7

Q3.Does this shape have a right angle inside it?

3/7

Q4.Which shapes have a right angle (tick 2)

4/7

Q5.How many right angles are there inside a square?

5/7

Q6.Which angle is a right angle?

6/7

Q7.Which angles are right angles (tick 2)

Select two (2) boxes

7/7

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:

Recognise acute and obtuse angles

Recognise acute and obtuse angles Source of all images : Mr Kelsall or Oak National Academy

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.REVIEW: How many degrees are there in a right angle?

1/6

Q2.An angle measuring less than 90° is:

2/6

Q3.Is a right angle acute, obtuse or neither?

3/6

Q4.Which angle is an acute angle?

4/6

Q5.Which angles are obtuse (tick 2)

5/6

Q6.Which angles are acute (tick 2)

6/6

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:

Recognise acute and obtuse angles

Recognise acute and obtuse angles Source of all images : Mr Kelsall or Oak National Academy

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Q1.REVIEW: How many degrees are there in a right angle?

1/6

Q2.An angle measuring less than 90° is:

2/6

Q3.Is a right angle acute, obtuse or neither?

3/6

Q4.Which angle is an acute angle?

4/6

Q5.Which angles are obtuse (tick 2)

5/6

Q6.Which angles are acute (tick 2)

6/6

Lesson summary: Recognise 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

Take part in The Big Ask.

The Children's Commissioner for England wants to know what matters to young people.

Share your views and have your voice heard.

The next lesson in Angles is "Angles within a shape"

Browse Oak's lessons: