Understand congruence and similarity using physical models, transparencies, or geometry software.
G.8.1. Verify experimentally the properties of rotations, reflections, and translations:
G.8.1(a) Lines are taken to lines, and line segments to line segments of the same length.
G.8.1(b) Angles are taken to angles of the same measure.
G.8.1(c) Parallel lines are taken to parallel lines.