# Octagon Angle Theorems

- Author:
- Tim Brzezinski

Interact with the app below for a few minutes.
Then, answer the questions that follow.
Be sure to change the locations of this octagon's vertices each time

*before*you drag the slider!Into how many non-overlapping triangles were we able to split this octagon?

What is the sum of the measures of the interior angles of *each triangle*?

Use your responses from the two questions above to **determine the sum of the measures of the interior angles of this octagon**.

What is the **sum of the measures of the exterior angles **of this octagon?