The general formulas for calculating the arc length of a section of a circle are. Arc Length Formula s L ds L d s. If you know the radius r r you can use that to find the circumference C C using the formula C 2pr C 2 p r.
Well of course it is but its nice that we came up with the right answer.
Well of course it is but its nice that we came up with the right answer. If you know the radius r r you can use that to find the circumference C C using the formula C 2pr C 2 p r. Demonstration of the Formula S r th The interative demonstration below illustrates the relationship between the central angle of a circle measured in radians and the length of the intercepted arc. The length of an arc depends on the radius of a circle and the central angle th.