A circle has a diameter of 12. Using 3.14 for pi, what is its area?
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Correct!
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Correct answer to question 182 (Mathematics Knowledge): 113.04
Method
The radius is half the diameter, or 6. Area is pi times the radius squared, so 3.14 x 36 = 113.04. Using the diameter instead of the radius gives the wrong answer, 452.16.
Updated: November 2026
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