Transformations - Rotations

Here is the video we watched today in class.  Please take the time to review the rules:

90 degree CCW  or 270 degrees CW -  (x, y)  becomes  (-y, x)          ***Keep in mind that the

180 degree                                               -  (x, y)  becomes  (-x, -y)          negative sign just means 

270 degree CCW or 90 degrees CW   -  (x, y)  becomes  (y, -x)            take the opposite integer.