The circumference of a 40 mm circle is: 126 mm
Circumference = 20*pi mm
The circumference of a circle with a diameter of 55 mm is: 172.8 mm
The circumference of a circle with a diameter of 110 mm is 345.58 mm
The diameter of a circle that has a circumference of 113 mm is about 35.97 mm
A circle with a radius of 6 mm has a circumference of 37.7 mm
The circumference of a circle with a diameter of 13 mm is: 40.84 mm
The circumference of a circle that is 16 mm in diameter is 50.27 mm
Circumference = 204.2 mm, approx.
Diameter: 24.26 mm Circumference: 76.215 mm
Circumference = 2*pi*4 mm or 8*pi mm
Circumference of a circle = π × diameter = π × 80 mm = 80π mm ≈ 251 mm