Arc Length

The endpoints of an arc determine a central angle called the central angle of the arc.
This proportion is to calculate the length of an arc. With this proportion, all you do is cross multiply and divide to find each variable.
	Now, if you wanted to calculate the arc length of this figure, all you need to know is circumference and central angle to find the arc-length.
From the figure shown above, these are the variables that are given to solve this problem.
With the given variables, substitute the given variables into the equation.
Now, after you substitute, just cross multiply and divide.
Your answer should be 70.65 in