What do you notice when you move the slider?
Rotate the triangle 90 degrees using the slider, what are the original ordered pairs? What are the new ordered pairs? What do you notice?
Rotate the triangle 180 degrees using the slider, what are the original ordered pairs? What are the new ordered pairs? What do you notice?
Rotate the triangle 270 degrees using the slider, what are the original ordered pairs? What are the new ordered pairs? What do you notice?