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. Then answer the question that follows.