3.14159
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It is pi/2 + 2*k*pi radians for integer k.
circumference of a circle = 2*pi*radius or pi*diameter
circumference = 2*pi*9.5 = 19*pi units of measurement
Circumference is the perimeter or the measurement of outline of a circle and pi is represented as 22 divided by 7.
circumference = 3476*pi units of measurement