# Calculating angles on a line or around a point

## Lesson details

### Key learning points

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

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 3 Questions

Q1.
Can you draw a triangle with a reflex angle?
yes
Q2.
Can you draw a quadrilateral with a reflex angle?
no
Q3.
Draw a quadrilateral with these angles (30°, 30°, 70°). What is the size of the missing angle?
50°
It's impossible to draw

## Exit quiz

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### 5 Questions

Q1.
What is the size of the missing angle?
120°
60°
Q2.
What is the size of the missing angle?
240°
30°
Q3.
What is the size of the missing angle?
50°
Q4.
How is this drawing incorrectly drawn?
Correct answer: the angles 130° and 50° are not drawn like a straight line
The angles add up to greater than 180°
The angles do not add up to 360°
Q5.
What angle would 4pm show?