Rotation of 90,180, 270 and 360 degrees about the origin

Consider where the points move as the shape is rotated about the origin?[br]Where would the general point (x,y) map to after a rotation of[br][list][br][*]90 degrees?[br][*]180 degrees?[br][*]270 degrees?[br][*]360 degrees?[br][/list]
[color=#0a971e]Created by N.Trubridge[/color]

Information: Rotation of 90,180, 270 and 360 degrees about the origin