Quadrilateral Interior & Exterior Angle Sum Theorems (V2)
Directions:
Mess around with the applet below for a few minutes.
As you do, BE SURE TO DRAG THE PINK VERTICES around.
As you move these pink vertices around, be sure this quadrilateral stays CONVEX!
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.