There are three types of arcs. This video shows how to find the length of a major arc. The arc length is the fractional amount of the circumference of the circle.
Plug the measurement of the arcs central angle into the formula.
Then we just multiply them together. Then if you multiply the length all the way around the circle the circles circumference by that fraction you get the length along the arc. A r² th 2 15² p4 2 8836 cm². An explanation of major and minor arcs and the formula to find the length of an arc from the length of the radius and the measure of the vertex angle.