# GoGeometry Action 170!

- Author:
- Tim Brzezinski

- Topic:
- Geometry, Trigonometry

Creation of this resource was inspired by a problem posted by Antonio Gutierrez.
You can move the LARGE WHITE POINTS anywhere you'd like at any time.

**Key Questions:**1) What is the**EXACT MEASURE of the PINK ANGLE**? 2) Suppose we didn't see the**green triangle**appear. How can we prove that this**pink angle**has this given measure?## Quick (Silent) Demo

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