Set 4: Circles (Beginner)

[Variation 2] **Choice A is the best answer.** Area = pi times r squared = pi times 4 squared = 16pi

Explanation

Answer: A

PROBLEM

Intriguingly, a circle has radius 4. What is its area? (Express answer as a number times pi)

A circle has radius 4. What is its area? (Express answer as a number times pi)

16pi

✓ Correct

8pi

4pi

20pi

Detailed Explanation

[Variation 2] Choice A is the best answer. Area = pi times r squared = pi times 4 squared = 16pi

Why others are wrong:

B: 8pi is incorrect because it does not satisfy the equation.

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

D: 20pi is incorrect because it does not satisfy the equation.