How to Find an Angle Outside of a Circle! (tangents and secants)

How do you find the angle outside of a circle? What if it's made of two tangents? What if it's made of a tangent and a secant? Or two secants? What do you do if "x" is involved? This video explains the theorem behind finding angles outside of circles, and it also shows how to solve basic and advanced problems using this theorem.
Here are some additional videos about angles in and on circles:
Central Angles and Inscribed Angles! (theorems AND examples): • Central Angles and Ins...
Angles of Intersecting Chords! (theorem AND examples): • Angles of Intersecting...
Tangent Chord Angles! (theorem AND examples): • Tangent Chord Angles! ...
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