Learning goals: Teacher Facing Draw and label rotations of 180 degrees of a line segment from centers of the midpoint, a point on the segment, and a point not on the segment. Generalize (orally and in writing) the outcome when rotating a line segment 180 degrees. Identify(orally and in writing) the rigid transformations that can build a diagram from one starting figure. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.1 Rigid Transformations and Congruence, Grade 8.