Below you are given circle A with secant line ED and tangent line EB intersecting [i]outside[/i] the circle. [br]Just like in the previous investigation, move point B, C, D, and E around to test out your hypothesis once you have an idea.

Drag the points/lines around on the circle and observe the angle and arc measurements.[br]What relationship can you identify? (The sum and difference of the arcs shown should help you figure this out)