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mojhsa [17]
3 years ago
8

What is the circumference of a circle with area 81 \pi square inches?

Mathematics
1 answer:
jok3333 [9.3K]3 years ago
7 0
Area = πr² ⇒
81π = πr²  ⇒  81 = r²   ⇒ r = √81 = 9 in

<span>Circumference = 2</span>πr = 2*9*π = 18π in
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