角和弧的不等关系

Blurb/stub article

In the configurations from here and here, we sometimes want bounds on $\angle{AXB}$ (for example, later when doing cyclic quadrilateral characterizations).

Diagram 1 (secants/chords intersect inside circle)

Diagram 2 (secants intersect outside circle)

Diagram 3 (secant and tangent intersect (outside of circle necessarily))