Geometry and TrigonometryEasyRadius from an area of 49 pi
Geometry and Trigonometry practice question
A circle has an area of 49π square inches. What is its radius, in inches?
Answer: 7
πr² = 49π gives r² = 49, so r = 7.
Common wrong answers
- If you answered 14
- 14 is the diameter.
- If you answered 49
- 49 is r².
- If you answered 24.5
- 24.5 halves 49.
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