25.12 cm
The circumference of a circle is also known as the perimeter of the circle. The formula for the circumference of the circle is;
Circumference = 2*pi*r
pi= constant= 3.14
r= radius= 4 centimeter
r= 4 x 10^-2 meters= 0.04 meters
Circumference= 2* 3.14 * 0.04 meters
Circumference= 0.2512 meters
Circumference = 2*pi*r
pi= constant= 3.14
r= radius= 4 centimeter
r= 4 x 10^-2 meters= 0.04 meters
Circumference= 2* 3.14 * 0.04 meters
Circumference= 0.2512 meters
12.66