Set 2: Circles (Intermediate)

**Choice D is the best answer.** Arc length = (60/360) times 2 times pi times 5 = 1.6666666666666665pi

Explanation

Answer: D

PROBLEM

A circle has radius 5. What is the arc length of a 60-degree sector? (Express as a number times pi)

10pi

2.6666666666666665pi

5pi

1.6666666666666665pi

✓ Correct

Detailed Explanation

Choice D is the best answer. Arc length = (60/360) times 2 times pi times 5 = 1.6666666666666665pi

Why others are wrong:

A: 10pi is incorrect because it does not satisfy the equation.

B: 2.6666666666666665pi is incorrect because it does not satisfy the equation.

C: 5pi is incorrect because it does not satisfy the equation.