# Polygons: Exterior Angles - REVAMPED

- Author:
- Tim Brzezinski

The exterior angles of a triangle, quadrilateral, and pentagon are shown, respectively, in the applets below.
You can control the size of a colored exterior angle by using the slider with matching color.
Feel free to move the vertices of these polygons anywhere you'd like.

**Note:**For the**quadrilateral**&**pentagon**, the last two applets work best if these polygons are kept**convex.**If you don't remember what this term means, click here for a refresher.## Exterior Angles of a Triangle

## Exterior Angles of a Quadrilateral

## Exterior Angles of a Pentagon

## 1.

What do you notice? What is common about the measures of the exterior angles of any one of these polygons?

## 2.

Do you think what you've observed for the triangle, quadrilateral, and pentagon above will also hold true for a hexagon, heptagon, and octagon? Create a new GeoGebra file and do some investigating to informally test your hypotheses!