The document defines and provides examples of symmetry and rotational symmetry. Symmetry refers to a figure that can be folded in half and have matching parts, with the dividing line called the line of symmetry. Rotational symmetry occurs when a figure appears unchanged after being rotated less than 360 degrees around a central point of rotation, with the smallest rotation angle being the angle of rotation. Examples are provided of figures that are symmetrical or do not have symmetry when rotated.