Estimate the circumference of a circle given its radius.
Check the final answer first, then review the worked steps.
Problem
Estimate the circumference of a circle given its radius.
Step-by-step solution
The radius is 1.5 units. The circumference C = 2 pi r. Using pi approx 3.14, C = 2 3.14 1.5 = 9.42 units. The closest estimate is 9 units.
Answer
9 units