The circumference of a circle with a diameter of 12 is about: 37.7 (C = diameter x Pi).
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The circumference of a circle with a diameter of 12 cm is: about 37.7 cm
The circumference of a circle is pi times the diameter, so it would be 12*pi or about 37.7.
The diameter of a circle with a 12-foot circumference is about 3.82 feet. (circumference divided by Pi = diameter).
If a circle has a diameter of 12 inches the circumference will be about 37.7 inches. (C = d x Pi)
-- 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).