8
Answer: BSet 1: Circles (Beginner)
Explanation
PROBLEM
A circle has radius 3. What is its circumference? (Express answer as a number times pi)
A circle has radius 3. What is its circumference? (Express answer as a number times pi)
A.
9pi
B.✓ Correct
6pi
C.
8pi
D.
3pi
Detailed Explanation
Choice B is the best answer. Circumference = 2 times pi times r = 2 times pi times 3 = 6pi
Why others are wrong:
A: 9pi is incorrect because it does not satisfy the equation.
C: 8pi is incorrect because it does not satisfy the equation.
D: 3pi is incorrect because it does not satisfy the equation.