If the diameter is 18, then the circumference is d*pi or 18pi. 18pi=56.52 if you use 3.14 as pi.
Chat with our AI personalities
The circumference of a circle with a diameter of 18 yards is: 56.55 yards (diameter x Pi = circumference).
The diameter is about 18.
If the diameter of a circle is 18 centimeters the circumference will be about 56.55 cm (d x Pi = C)
The circumference of a circle that has a diameter of 18 inches is about 56.55 inches. (C = d x Pi).
The circumference of a circle with an 18-inch diameter is about 56.55 inches. (C = d x Pi)