More Lessons for High School Regents Exam
High School Math based on the topics required for the Regents Exam conducted by NYSED.
How to find the arc length of a a circle?
The following diagram gives the formulas to calculate the arc length of a circle. Scroll down the page for more examples and solutions.
Commonly confused with arc measure, arc length is the distance between the endpoints along the circle. Arc measure is a degree measurement, equal to the central angle that forms the intercepted arc. Arc length is a fraction of the circumference of the circle and calculated that way: find the circumference of the circle and multiply by the measure of the arc divided by 360.
This video discusses 2 different ways of measuring arc length, by degrees and by distance such as inches. It also shows 3 different example problems, problems you will likely see in class, on how to find arc length using a proportion. The three different example have you find arc length, central angle, and radius of circles.
Finding the arc length on a circle
Arc Length Theorem
How to Find the Length of an Arc
This video lesson discusses how to find the length of an arc. First, the arc length theorem is reviewed and explained. An example of find the length of a major arc is modeled. The given information is the measure of the related minor arc and the radius of the circle.
Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.