Question #N430
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
Click to reveal answer
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.