AD and BC are chords in circle O. The textshows the measures of the angles and arcs in circle O. Drag A, B, C, or D to adjust the chords and their angles in the circle.
1. How are angles AEB and CED related? How are their measures related?
2. Are the measures of the arcs and angles equal? What is the only way you can make them all equal?
3. How does the total measure of arcs AB and CD compare to the measures of angles AEB and CED?
4. The larger arc will be (closer to / farther from) the vertex of the vertical angles.