◄Previous: 1.1 Angles, notation and measurement

# Try some yourself

## Question 1

What angles do the hour hand and the minute hand of a clock turn through in five hours?

### Answer

Every hour the minute hand turns through 360°. It will have made five such revolutions in five hours. This amounts to 1800°.

The hour hand turns through 30° every hour ( of 360°). In five hours it will turn through 5 × 30° = 150°.

## Question 2

Give an alternative notation for labelling each of these angles in the diagram below.

- (a) α

- (b) β

- (c)

- (d) ACD

### Answer

- (a) or CAB.

- (b) or BCA.

- (c) γ or DAC.

- (d) δ or .

◄Contents►Next: 1.2 How to measure an angle

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