This math topic focuses on calculating the arc length of a part of a circle. Students are required to determine the arc length for a given fraction of the circle’s circumference, using a specified radius. Each problem provides the fraction of the circle and the radius, and students must use these values to compute the arc length in decimal form. This set of problems serves as an introduction to understanding the geometry of circles, specifically partial areas and circumferences. The problems enhance skills in applying formulas and understanding the relationship between radius, circumference fraction, and arc length.