Question #N142
A circle has a diameter of 10 units. What is the area of the circle, in square units? (Express your answer in terms of pi.)
A. 5\pi
B. 10\pi
C. 25\pi
D. 100\pi
Correct Answer is: C
The area of a circle is given by the formula πr², where r is the radius of the circle. Since the diameter of the circle is 10 units, the radius is 5 units. Therefore, the area of the circle is π(5)² = 25π square units.