Classifying Arcs

This applet allows users to discover the different types of arcs classified by their arc measure.
1. As you drag the slider what measurement in the sketch changes? 2. What do you notice about the arc measure and the central angle measure? 3. For what degrees of a central angle is the arc considered a minor arc? a major arc? a semi-circle? 4. What are the appropriate ways to denote a minor arc? a major arc? a semi-circle?