Question

circle A has an area of 254.469 square units. What is the circumference of circle A? Round your answer to the nearest hundredth, if necessary.

Answer 1

C=2πr
when area is given use this formulae C=2 sqrt (πA)=56.55
hope this helps

Answer 2

A = r² π
254.469 = r² π
r² = 254.469 : 3.14159
r² = 81.00866
r = 9.0048
C = 2 r π = 2 * 9.0048 * 3.14159 = 56.55 units