What type of measure does a major arc have?

A major arc is a portion of a circle that is greater than 180 degrees. Its measure is calculated as the difference between 360 degrees and the measure of the corresponding minor arc. Therefore, if a minor arc measures, for example, 120 degrees, the major arc would measure 240 degrees. In summary, a major arc's measure is always greater than 180 degrees and less than 360 degrees.