Say I have a square with the points (2,4)-(3,4)-(3,5)-(2,5).

Say I want to rotate this square 90 degrees around the origin I get the points

(-4,2)-(-5,2)-(-5,3)-(-4,3) I did this by spinning my paper 90 degrees. How can I use a protractor to be able to solve this problem? This is the way that I am suppose to solve this problem by using a protractor and I really do not understand how to do this. Thank you for any help. Or do you know how I can solve this besides turning my paper the alloted degrees and getting the coordinates.