### How to Find the Circumference of Concentric Circles

Watch this video math lesson to learn how to find the circumference of concentric circles. The first part of the video reviews the formula of the circumference of a circle. Two formulas are given because of the dynamic between the diameter and the radius. 1 diameter is equal to 2 radii. The example models finding the circumference of the outer of two concentric circles. The diameter of the inner circle is given and the distance between the two circles is given.

Length:
03:41