Set 4: Circles (Beginner)

[Variation 1] **Choice D is the best answer.** Radius = Diameter / 2 = 18 / 2 = 9

Explanation

Answer: D

PROBLEM

Recent studies show that a circle has diameter 18. What is its radius?

A circle has diameter 18. What is its radius?

✓ Correct

Detailed Explanation

[Variation 1] Choice D is the best answer. Radius = Diameter / 2 = 18 / 2 = 9

Why others are wrong:

A: 18 is incorrect because it does not satisfy the equation.

B: 10 is incorrect because it does not satisfy the equation.

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