- Congruence - Glossary Term
Two plane figures are called congruent if one can be moved by a sequence of translations, rotations and reflections so that it fits exactly on top of the other figure.
Two figures are congruent when we can match every part of one figure with the corresponding part of the other figure. For example, the two figures below are congruent.
Matching intervals have the same length, and matching angles have the same size.