Divide 39 by pi to find the diameter of circle 1 and then subtract four inches from your answer to give the diameter of circle 2.
Circle 1 = 39/pi = 12.41408556 inches
Circle 2 = 12.41408556 - 4 = 8.41408556 inches
Diameter of a circle = circumference/pi
If the circumference of a circle is 17.27, the diameter is: 5.5
The diameter of a circle with the circumference of 3.25 is: 1.034
If a circle's diameter is 10, the circumference is: 31.416
The circumference of a circle with a diameter of 14 is: 43.982
Diameter of a circle = circumference/pi
Diameter of a circle = circumference/pi
The circumference of any circle is (pi) x (the circle's diameter).
A circle with a circumference of 11.25 has a diameter of: 3.581
If the diameter of a circle is 9 the circumference is: 28.3
If a circle has a diameter of 5 the circumference is: 31.4
The circumference of a circle that has the diameter of 8 is: 25.1
The diameter of a circle with the circumference of 3.25 is: 1.034
If the circumference of a circle is 17.27, the diameter is: 5.5
The circumference of a circle that has a diameter of 3.911 is: 12.29
The circumference of a circle with a diameter of 51m is: 160m
If a circle's diameter is 10, the circumference is: 31.416