Pie (3.14159...) times (*) 2 times (*) radius === or This equation may be for the area but hopefully it's for circumference. Anyway, the answer to your question is 25.13274123... (Pie times 2 times 4mm).
You neglected to say whether the 4mm is the radius of the circle, or the diameter,or the circumference. Each possibility leads to a different area.
If a circle has a circumference of 43.98 the radius is: 7 (6.999).
If a circle has a circumference of 16 cm then the radius is about: 2.546 cm
The radius of a circle with a circumference of 30 inches is: 4.77 inches.
The radius of a circle with circumference of 63 m is 10.03 m
You neglected to say whether the 4mm is the radius of the circle, or the diameter,or the circumference. Each possibility leads to a different area.
You neglected to say whether the 4mm is the radius of the circle, or the diameter,or the circumference. Each possibility gives you a different area.
The circumference of circle with radius 12cm is 75.4cm
The circumference of a circle if the radius is 29 is about 182.21
The circumference of a circle with a radius of 11 is: 69.12
The circumference of a circle that has a radius of 3.2cm is: 20.1cm
The radius of a circle with a circumference of 110 is: 17.507
The circumference of a circle with a radius of four is: 25.13
The circumference of a circle with a radius of 6.7 is: 42.097
A circle with a radius of 4m has a circumference of 25.133m.
The circumference of a circle if its radius is 3 is about 18.85
Radius of a circle = circumference/2*pi