Answer:
Step-by-step explanation:
The formula for calculate the arc lenght is:
Where "r" is the radius and "" is the central angle of the arc in degrees.
The formula used to find the circumference of a circle is:
Where "r" is the radius.
Then, we can observe that the formula for calculate the arc lenght can be rewritten in this form:
Where "C" is the circumference of the circle.
Finally we need to substitute the central angle and the circumference into . Then the result is this: