Circumference = Pi X Diameter = 3.1415 X 4cm = 12.566cm
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Circumference of a circle = 2*pi*radius or diameter*pi
The formula for the circumference of a circle is C = πd, π = 3.142, d = 4cm C = 3.142 x 4cm C = 12.568cm
About 12.56 cm Btw the formula is diameter x pi (3.14)
The circumference of a circle with a radius of 4cm is: 25.13 cm (r x 2 x pi)
It is: 2 to 3 respectively