Set 3: Circles (Beginner)

[Variation 1] **Choice D is the best answer.** Area = pi times r squared = pi times 2 squared = 4pi

Explanation

Answer: D

PROBLEM

Recent studies show that a circle has radius 2. What is its area? (Express answer as a number times pi)

A circle has radius 2. What is its area? (Express answer as a number times pi)

6pi

2pi

4pi

✓ Correct

Detailed Explanation

[Variation 1] Choice D is the best answer. Area = pi times r squared = pi times 2 squared = 4pi

Why others are wrong:

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

B: 2pi is incorrect because it does not satisfy the equation.

C: 4pi is incorrect because it does not satisfy the equation.