1. In the following figure,
O is the center of the circle. OA is congruent to CB. What is the degree measure of the angle at A?
2. In the figure below,
O is the center of the circle. The distance from A to D is the same as the distance from O to B. If the angle at A has 20o, how many degrees are in /COB?
3. In the figure below, OE | ON, and AP||ON. If /AOE is 30o, what is /NAP?
4. In the figure below /AOB is 74o. What is /BAC?