Tangent-Chord Relationship

This applet lets the user explore the relationship between the angle formed by a tangent and a secant (or chord) where the two lines intersect at the point of tangency. You can change point R to change the size of the intercepted arc.
Change the size of the arc by moving point R. Look at the relationship between the intercepted arc and <RPS. Include arcs of various sizes including arcs that are larger than 180 degrees in measure.