Question #N429
A circle has a diameter of 10 inches. What is the circumference of the circle? (Express your answer in terms of pi.)
A. 5\pi
B. 10\pi
C. 20\pi
D. 100\pi
Correct Answer is: B
The circumference of a circle is found using the formula C = 2\pi r, where r is the radius of the circle. Since the diameter is 10 inches, the radius is 5 inches. Therefore, the circumference is 2\pi (5) = 10\pi inches.