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3 years ago

12

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.

2 answers:

andrey2020 [161]3 years ago

8 0

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

REY [17]3 years ago

7 0

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

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