The original image is the square
labeled ABDC. The image after rotating the square 45 degrees (counterclockwise)
about its center gives the square labeled A'B'D'C'.
The original image is the square labeled ABDC. The image after
rotating the square 45 degrees (counterclockwise) about the point P is the square
labeled A'B'D'C'. Note that point P is outside the square.
In the above example, the angle of rotation is the angle APA'. This is the same
as the angle CPC'.
A JavaSketchPad page is provided for you to explore rotations. Move any red point and observe
what happens. Try various positions for point P (i.e., inside and outside the
figure).
