Triangle Angle Sum Theorems

Question 1:

When working with the triangle's interior angles, did the transformations change the measures of the blue or green angles?

Question 2:

Try to move the triangle's angles to create a new triangle. What happens to the angles?

Question 3:

Move the angles of your triangle again. Slide the bar one more time all the way to the right. What do you notice?

Question 4:

What is the angle measure of a line?

Question 5:

From your observations, what is the sum of the measures of the interior angles of     any triangle?