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geniusboy [140]
3 years ago
7

The area of a circle is 16cm2. What is the circle's circumference?

Mathematics
1 answer:
Delicious77 [7]3 years ago
7 0
A=pir^2
c=2pir

a=pir^2=16
pir^2=16
divide both sides by pi or about 3.141592
r^2=5.0929581789406507446042804279205
sqrt both sides
r=2.2567583341910251477923178062431

circumference=2pir
circumference=2pi(2.2567583341910251477923178062431)
c=4.5135166683820502955846356124862pi
about 4.5pi square cm



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