in the diagram below point o is the center of the given circle what is the measure of arc de
Angles in a Circle and Cyclic Quadrilateral 131. The degree measure of a minor arc of a circle is the measure of. its corresponding central angle. In Figure 19.2, Degree measure of PQR = xÂ°. The degree measure of a semicircle in 180Â° and that of a major. arc is 360Â° minus the degree measure of the corresponding minor. arc.