A quadrilateral has been rotated counterclockwise about a center using an angle. Construct a ray from the center of rotation through a blue pre-image point. Then construct a second, coterminous ray that goes through the corresponding image point. Use the angle tool to construct the angle of rotation for that pair of corresponding points.[br][br]Do the same for each blue pre-image point.
What do you notice about the angle of rotation for the different pairs of corresponding points?
A perpendicular bisector has been constructed between a pair of corresponding points. Use the Perpendicular Bisector tool to construct the perpendicular bisectors for the other pairs of corresponding points. What do you notice?