When the radius of a circle is tripled, how are the area and circumference of the circle affected?
(A) The area is 9 times as large and the circumference is 3 times as large. (B) The area is 3 times as large and the circumference is 9 times as large. (C) The area is 3 times as large and the circumference is 6 times as large. (D) The area is 6 times as large and the circumference is 3 times as large. (E) The area is 3 times as large and the circumference is 3 times as large.
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Source: CEMC, University of Waterloo,
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