Recognise acute and obtuse angles

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

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.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

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.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.

Unit quizzes are being retired in August 2023

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

Recognise acute and obtuse angles

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

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)

Select two (2) boxes

5/6

Q6.Which angles are acute (tick 2)

Select two (2) boxes

6/6

Unit quizzes are being retired in August 2023

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

Recognise acute and obtuse angles

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

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)

Select two (2) boxes

5/6

Q6.Which angles are acute (tick 2)

Select two (2) boxes

6/6

Lesson summary: Recognise 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:
Chair yoga