Pentagon
Interact with this app for a few minutes. Be sure to move the pentagon's vertices around each time you decide to re-slide the slider!
Re: interior angles, into how many non-overlapping triangles was the pentagon split?
What do you think the sum of the measures of the interior angles of this pentagon would be? Why do you say this?
What do you think the sum of the measures of the exterior angles of this pentagon would be? Why do you say this?