Calculating angles on a line or around a point

In this lesson we will learn how to calculate angles on a straight line, vertically opposite angles and angles around a point.

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.Can you draw a triangle with a reflex angle?

1/3

Q2.Can you draw a quadrilateral with a reflex angle?

2/3

Q3.Draw a quadrilateral with these angles (30°, 30°, 70°). What is the size of the missing angle?

3/3

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.Can you draw a triangle with a reflex angle?

1/3

Q2.Can you draw a quadrilateral with a reflex angle?

2/3

Q3.Draw a quadrilateral with these angles (30°, 30°, 70°). What is the size of the missing angle?

3/3

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:

Calculating angles on a line or around a point

Calculating angles on a line or around a point Source of all images : Mr Kelsall or Oak National Academy

Q1.What is the size of the missing angle?

1/5

Q2.What is the size of the missing angle?

2/5

Q3.What is the size of the missing angle?

3/5

Q4.How is this drawing incorrectly drawn?

4/5

Q5.What angle would 4pm show?

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:

Calculating angles on a line or around a point

Calculating angles on a line or around a point Source of all images : Mr Kelsall or Oak National Academy

Q1.What is the size of the missing angle?

1/5

Q2.What is the size of the missing angle?

2/5

Q3.What is the size of the missing angle?

3/5

Q4.How is this drawing incorrectly drawn?

4/5

Q5.What angle would 4pm show?

5/5

Lesson summary: Calculating angles on a line or around a point

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