2
Answer: BSet 3: Circles (Advanced)
Explanation
PROBLEM
A circle has radius 2. What is the area of a 180-degree sector? (Express as a number times pi)
A circle has radius 2. What is the area of a 180-degree sector? (Express as a number times pi)
A.
4pi
B.✓ Correct
2pi
C.
4pi
D.
4pi
Detailed Explanation
Choice B is the best answer. Sector area = (180/360) times pi times 2 squared = 2pi
Why others are wrong:
A: 4pi is incorrect because it does not satisfy the equation.
C: 4pi is incorrect because it does not satisfy the equation.
D: 4pi is incorrect because it does not satisfy the equation.