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What is the circumference of a circle that has a radius of 3.9?
Wiki User
∙ 13y ago
24.492, unless you want more digits of pi besides the standard 3.14.
The circumference of a circle is equal to the diameter multiplied by pi, or the radius multiplied by two, then multiplied by pi.
c = d*pi
c = 2*r*pi
c = circumference
d = diameter
r = radius
pi = 3.141593
Wiki User
∙ 13y ago
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