pi ( = 3.1416 approx) metres.
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If a circle has a radius of 1, the diameter is 2, and the circumference is 6.28 (approximately).
The formula to calculate the circumference of a circle is C = πd, where C is the circumference, π is approximately 3.14, and d is the diameter of the circle. If the diameter is 1 cm, then the circumference would be C = π(1) = 3.14 cm.
-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).
Circumference of any circle = 2*pi*radius or diameter*pi
50 centimeters