# G.GSRT.5 Pentagons: Exterior Angles

- Author:
- Dan Dale, Tim Brzezinski

- Topic:
- Angles

Before you begin:
Feel free to move this pentagon's vertices (corners) wherever you'd like.

**You can control the size of the red exterior angle by using the red slider. You can control the size of the blue exterior angle by using the blue slider. You can control the size of the green exterior angle by using the green slider.**This applet works best if this pentagon is kept**convex**. If you don't remember what this means, click here for a refresher. Interact with the applet for a minute or two. What can you conclude about the sum of the exterior angles of any pentagon?## New Resources

## Discover Resources

Download our apps here: