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
If the diameter of a circle is 69mm then the circumference is: 216.8mm (diameter x pi = circumference).
Diameter of a circle = circumference/pi
Diameter of a circle = circumference/pi
Circumference of a circle = diameter*pi Diameter of a circle = circumference/pi
The circumference of a circle that has a diameter of 21 is about 65.97
The circumference of a circle if the diameter is 1.1 is about 3.46
The circumference of a circle with diameter 2m is about 6.28m
The circumference of a circle, if its diameter is 5cm, is about 15.71cm
Diameter of any circle = circumference/pi
The circumference of a circle that has a diameter of 26m is 81.68m
The circumference of a circle if the diameter is 25.8 is: 81.1
The circumference of a circle with a diameter of 14 is: 43.982