# Quadrilateral Interior & Exterior Angle Sum Theorems (V2)

- Author:
- Tim Brzezinski

- Topic:
- Angles, Quadrilaterals

**Directions:**Mess around with the applet below for a few minutes. As you do,

**BE SURE TO DRAG THE PINK VERTICES around**. After interacting with this applet, please answer the questions that appear below it.

**Questions:**1) What can you conclude about the

**sum of the interior angle measures**of a quadrilateral? Explain how you came to this conclusion. 2) What can you conclude about the

**sum of the exterior angle measures**of a quadrilateral? Explain how you came to this conclusion.