- Verify experimentally lines are mapped to lines, and line segments to line segments of the same length.
- Verify experimentally angles are mapped to angles of the same measure.
- Verify experimentally parallel lines are mapped to parallel lines

## Parallel lines and line segments and angles are mapped to other congruent parallel lines and line segments and angles by translations.

## Parallel lines and line segments and angles are mapped to other congruent parallel lines and line segments and angles by rotations.