Circumference of circle: 2*pi*5 = 31.416 units rounded to 3 decimal places
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The radius of the circle works out as 5 units in length
if you mean a radius of 5 units then the answer is 78.54 APEX
Circumference = 2*pi*radius In this case radius = 5 units so circumference = 31.4159 units approx.
Circumference = 2 × π × radius → circumference = 2 × π × 5 ≈ 31.42 units
The circumference of a circle 5cm in radius is about 31.42cm