4
Answer: ASet 4: Circles (Intermediate)
Explanation
PROBLEM
Recent studies show that a circle has radius 4. What is the arc length of a 60-degree sector? (Express as a number times pi)
A circle has radius 4. What is the arc length of a 60-degree sector? (Express as a number times pi)
A.✓ Correct
1.3333333333333333pi
B.
4pi
C.
2.333333333333333pi
D.
8pi
Detailed Explanation
[Variation 1] Choice A is the best answer. Arc length = (60/360) times 2 times pi times 4 = 1.3333333333333333pi
Why others are wrong:
B: 4pi is incorrect because it does not satisfy the equation.
C: 2.333333333333333pi is incorrect because it does not satisfy the equation.
D: 8pi is incorrect because it does not satisfy the equation.