Geometry and TrigonometryEasyFraction of a circle in a half turn
Geometry and Trigonometry practice question
An arc of a circle has a central angle of 180°. What fraction of the circle's circumference is the arc?
Answer: 1/2 or 0.5
180° is half of the 360° in a full circle, so the arc is half the circumference.
Common wrong answers
- If you answered 180
- 180 is the angle, not a fraction.
- If you answered 1/4
- 1/4 would be 90°.
- If you answered 1/180
- 1/180 divides 1 by the angle.
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