8
Answer: BSet 1: Circles (Intermediate)
Explanation
PROBLEM
A circle has radius 6. What is the arc length of a 120-degree sector? (Express as a number times pi)
A circle has radius 6. What is the arc length of a 120-degree sector? (Express as a number times pi)
A.
6pi
B.✓ Correct
4pi
C.
5pi
D.
12pi
Detailed Explanation
Choice B is the best answer. Arc length = (120/360) times 2 times pi times 6 = 4pi
Why others are wrong:
A: 6pi is incorrect because it does not satisfy the equation.
C: 5pi is incorrect because it does not satisfy the equation.
D: 12pi is incorrect because it does not satisfy the equation.