10
Answer: DSet 1: Circles (Beginner)
Explanation
PROBLEM
A circle has radius 4. What is its circumference? (Express answer as a number times pi)
A circle has radius 4. What is its circumference? (Express answer as a number times pi)
A.
10pi
B.
4pi
C.
16pi
D.✓ Correct
8pi
Detailed Explanation
Choice D is the best answer. Circumference = 2 times pi times r = 2 times pi times 4 = 8pi
Why others are wrong:
A: 10pi is incorrect because it does not satisfy the equation.
B: 4pi is incorrect because it does not satisfy the equation.
C: 16pi is incorrect because it does not satisfy the equation.
🎉 Set Complete!
You've reviewed all explanations. Ready to try another set?