1
Answer: DSet 2: Circles (Advanced)
Explanation
PROBLEM
Recent studies show that a circle has radius 3. What is the area of a 180-degree sector? (Express as a number times pi)
A circle has radius 3. What is the area of a 180-degree sector? (Express as a number times pi)
A.
6pi
B.
9pi
C.
9pi
D.✓ Correct
4.5pi
Detailed Explanation
[Variation 1] Choice D is the best answer. Sector area = (180/360) times pi times 3 squared = 4.5pi
Why others are wrong:
A: 6pi is incorrect because it does not satisfy the equation.
B: 9pi is incorrect because it does not satisfy the equation.
C: 9pi is incorrect because it does not satisfy the equation.