SOLUTION: if a trampoline has a radius of 6.5 feet how much fencing is needed to go around the circumference

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Question 266569: if a trampoline has a radius of 6.5 feet how much fencing is needed to go around the circumference
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
WE need the circumference formula which is
C+=+2%2Api%2Ar
we know r = 6.5, so we have
{{C = 2*pi*6.5}}}
or
C+=+13%2Api feet