Set 4: Circles (Beginner)

[Variation 1] **Choice B is the best answer.** Area = pi times r squared = pi times 7 squared = 49pi

Explanation

Answer: B

PROBLEM

Recent studies show that a circle has radius 7. What is its area? (Express answer as a number times pi)

A circle has radius 7. What is its area? (Express answer as a number times pi)

14pi

49pi

✓ Correct

56pi

7pi

Detailed Explanation

[Variation 1] Choice B is the best answer. Area = pi times r squared = pi times 7 squared = 49pi

Why others are wrong:

A: 14pi is incorrect because it does not satisfy the equation.

C: 56pi is incorrect because it does not satisfy the equation.

D: 7pi is incorrect because it does not satisfy the equation.