Experiment! Try some of the following: -Slide the slider below the s = ___. What is happening? -Move point P around, including onto the arrow itself! -Check and uncheck the check boxes.
Think about this: If I gave you a paper with a triangle on it and a point and asked you to use your protractor to rotate the triangle around the point 130 degrees, how would you do it? Use the arrow above to give it some thought.