Secant Arcs and Angles in Circles

Secant Arcs and Angles in Circles
1) What do you notice about the relationship between the arcs and the angle?[br]2) what happens if the lines intersect:[br]2a: inside?[br]2b: outside?[br]2c: on the edge of the circle?

Information: Secant Arcs and Angles in Circles