Geometry and TrigonometryEasyRadius from a segment through the centre
Geometry and Trigonometry practice question
Points A and B lie on a circle with centre O, and segment AB passes through O. If AB = 14, what is the length of OA?
Answer: 7
AB is a diameter, so OA is a radius: 14 ÷ 2 = 7.
Common wrong answers
- If you answered 14
- 14 is the diameter.
- If you answered 28
- 28 doubles the diameter.
- If you answered 3.5
- 3.5 halves the radius.
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