Geometry and TrigonometryMediumHeight of a kite from its string angle
Geometry and Trigonometry practice question
A kite string 18 metres long makes an angle of 30° with the level ground. How many metres above the ground is the kite?
Answer: 9
18 sin 30° = 18 × 1/2 = 9.
Common wrong answers
- If you answered 36
- 36 divides by sin 30°.
- If you answered 15.6
- 15.6 uses cos 30°, the horizontal distance.
- If you answered 10.4
- 10.4 uses tan 30°.
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