Question #N815
A circle has a diameter of 10 centimeters. What is the area of the circle, in square centimeters, in terms of $\pi$?
A. $\pi$
B. $\pi$
C. $5\pi$
D. $25\pi$
Correct Answer is: D
The area of a circle is given by the formula $A = \pi r^2$, where r is the radius of the circle. Since the diameter is 10 centimeters, the radius is 5 centimeters. Therefore, the area of the circle is $A = \pi (5)^2 = 25\pi$ square centimeters.