8
Answer: DSet 3: Circles (Beginner)
Explanation
PROBLEM
A circle has diameter 18. What is its radius?
A circle has diameter 18. What is its radius?
A.
7
B.
8
C.
11
D.✓ Correct
9
Detailed Explanation
Choice D is the best answer. Radius = Diameter / 2 = 18 / 2 = 9
Why others are wrong:
A: 7 is incorrect because it does not satisfy the equation.
B: 8 is incorrect because it does not satisfy the equation.
C: 11 is incorrect because it does not satisfy the equation.