Question #N59
A circle has a diameter of 12 cm. What is the area of the circle, in square cm, in terms of \pi?
A. 12\pi
B. 36\pi
C. 72\pi
D. 144\pi
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Correct Answer is: B
The area of a circle is given by the formula \pi r^2, where r is the radius. Since the diameter is 12 cm, the radius is 6 cm. The area of the circle is then \pi (6 cm)^2 = 36\pi square cm.