Set 3: Circles (Beginner)

[Variation 1] **Choice A is the best answer.** Area = pi times r squared = pi times 3 squared = 9pi

Explanation

Answer: A

PROBLEM

Recent studies show that a circle has radius 3. What is its area? (Express answer as a number times pi)

A circle has radius 3. What is its area? (Express answer as a number times pi)

9pi

✓ Correct

12pi

6pi

3pi

Detailed Explanation

[Variation 1] Choice A is the best answer. Area = pi times r squared = pi times 3 squared = 9pi

Why others are wrong:

B: 12pi is incorrect because it does not satisfy the equation.

C: 6pi is incorrect because it does not satisfy the equation.

D: 3pi is incorrect because it does not satisfy the equation.