12. To rotate CW 270 degrees, find the points of the original triangle, make the Original X value becomes the new Y value and the new X value is the inverse of the original Y value.
B) to be in the same location as the original, it would be a 360 degree rotation.
13. to rotate 180 degrees mirror the image on the X and Y axis.
B) a 360 degree rotation.
See attached picture: