Tangent-Chord Angle

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. [br][br]You can change point R to change the size of the intercepted arc.
Tangent-Chord Relationship
Notice: where is the vertex of the angle? Inside or Outside the circle?
– Catherine, Marsha Hutzell

Information: Tangent-Chord Angle