The answer depends on what part of the circle measures 25.25 inches.
If a circle measures 83 inches in circumference the diameter is: about 26.42 inches. You can easily do this calculation for other circles by dividing the circumference by Pi (about 3.1416).
39 inches / pi = 12.4 inches
It means that the statement is referring to a circle or a sphere whose diameter measures 12 inches.
The radius (not raduis) is 8 inches.
Circumference of the circle: 23*pi = 72.257 inches rounded up to 3 decimal places
The straight-line measurement from one point to another through the origin of a circle is the diameter of the circle.
If the diameter of a circle is 12 inches the circumference is: 37.7 inches (diameter x pi = circumference).
The circumference of a circle with a diameter of 45 inches is 141.37 inches.
If a circle circumference is 9.5 inches the diameter is 3.024 inches.
If the circumference of a circle is 62.8 inches the diameter is: 20 inches.
The circumference of a circle with a diameter of 3 inches is 9.425 inches.