The circumference of a circle that has a diameter of 21 is about 65.97
If a circle has a diameter of 21 feet the circumference is: 65.97 feet (diameter x Pi = circumference).
The circumference of a 21 circle is: 65.97 (diameter x pi = circumference).
Circumference = 21*pi
The circumference of a circle with a 21 mile diameter is 66 miles (approx).
The diameter is approximately 6.7
Circumference = Diameter x pi = 21 pi = 65.973 inches(rounded)
6.687089
It is: 21*pi feet
Its diameter is: 21/pi = 6.685 inches rounded
65.94
21 inches