When rotating a triangle that appears on an X Y axis, if you need to rotate it -90 degrees does that move the image clockwise or counter clockwise?:confused:

Clockwise

Negative angles are clockwise.

That will move the image clockwise direction.if you want to move the same point in antyclockwise rotation, you have to move that through 270 gegree.
Hussain Ali

Yes, you will have to rotate it through 270 degrees if you want it to come to the same point.