Interior and Exterior Angles of a Triangle Task
Click on the button "Interior Angles"
What do you notice when you move the slider?
What transformation do we see when the angles move? Explain.
What is the sum of the angles of a triangle? How can you "prove" that is true?
Click on the button "Exterior Angles"
What do you notice when you move the slider?
What transformation do we see when the angles move?
What is the sum of the exterior angles of a triangle? How can you "prove" that is true?