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![Picture](/uploads/3/2/1/7/32177213/6631496.png?250)
Rotations are the third type of transformation we have discussed. We can rotate (turn) an image in two directions, clockwise (CW) or counterclockwise (CCW). Think about the direction the hands on a clock move. That is clockwise. The opposite direction would be counterclockwise. A rotation involves turning an image about a fixed point called the center of rotation. The center of rotation for our purposes will be the origin, (0,0). To rotate an image, you must first know the direction (CW or CCW) and the degree of rotation (usually either 90, 180, or 270 degrees). The corresponding points will form an angle of the same measure as the degree of rotation when connected using the center of rotation. Because rotating a figure does not change the size or shape (in other words, the corresponding side lengths and angle measures are congruent), the figures would still be congruent. See the investigation below for practice!