Divide the circumference (38") by Pi (about 3.1416) to get the diameter in inches.
If the circumference is 38, the diameter is 38/pi. Since the radius is half of the diameter, the radius is 19/pi.
The circumference c of any circle with diameter d is d X (pi). In this instance, 12 inches (3.14) = 38 inches, to the justified number of significant digits.
The circumference C = 2 r times pi C = 76 inches times pi. pi = 3.141592654...
The circumference of an 8-foot circle is: 25.13 feet.
Circumference = pi*38 = 119.3805208 or about 119.381 inches
Divide the circumference (38") by Pi (about 3.1416) to get the diameter in inches.
Diameter = Circumference/pi = 38/pi = 12.1 inches
Circumference of the circle: 38*pi in miles
The diameter is about 12.1
Circumference of a circle = π x DC = 3.14159 x 38C = 119.38 inches
If the circumference is 38, the diameter is 38/pi. Since the radius is half of the diameter, the radius is 19/pi.
The circumference c of any circle with diameter d is d X (pi). In this instance, 12 inches (3.14) = 38 inches, to the justified number of significant digits.
It is customary to call a circle a 38 inch circle if its diameter is 38 inches. If that is the case, the radius = diameter/2 = 19 inches.
That depends on what is meant by 38 mi but the circumference of any circle is 2*pi*radius or diameter*pi
Circumference = 2*pi*radius or diameter*pi
38/pi = 12.09577567 or about 12 feet