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How do you get the circumference of a circle with the area of 196 pi?
Wiki User
∙ 13y ago
A= pi(r)^2
C=pi*d
r= 1/2(d)
Area=196pi
Since you know that 196 has to be squared because of the Area formula, to find the radius, you take the square root of the number, this number is the radius of the circle. You also know that the circumference is pi times the diameter and you know the radius is half the diameter, or the diameter is twice the radius.
sqrt(196)=14
14=r
d=28
Circumference= 28pi
Wiki User
∙ 13y ago
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