Set 1: Circles (Advanced)

**Choice B is the best answer.** Sector area = (120/360) times pi times 5 squared = 8.333333333333332pi

Explanation

Answer: B

PROBLEM

A circle has radius 5. What is the area of a 120-degree sector? (Express as a number times pi)

25pi

8.333333333333332pi

✓ Correct

16.666666666666664pi

10pi

Detailed Explanation

Choice B is the best answer. Sector area = (120/360) times pi times 5 squared = 8.333333333333332pi

Why others are wrong:

A: 25pi is incorrect because it does not satisfy the equation.

C: 16.666666666666664pi is incorrect because it does not satisfy the equation.

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

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