Properties of Tangents
In the applet below, 2 tangent rays are drawn to a circle from a point outside that circle.  EB and AB are points of tangency.
Interact with the applet below by sliding the slider Then answer the questions that below
Questions:
1) How would you describe the intersection/angle made by of a radius  to a point of tangency? 
2) What can you conclude about the lengths EB and EA?