# GoGeometry Action 92!

- Author:
- Tim Brzezinski

- Topic:
- Angles, Circle, Tangent Line or Tangent

Creation of this applet was inspired by a tweet from Antonio Gutierrez (GoGeometry.) .
Feel free to move the

**2 blue points**and/or**2 white points**anywhere you'd like at any time.**How can we formally prove what this applet dynamically illustrates?**