Definition of Congruence and Some Basic Properties

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Objectives

Students know the definition of congruence and related notation, i.e., ≅. Students know that to prove two figures are congruent there must be a sequence of rigid motions that maps one figure onto the other.
Students know the basic properties of congruence are similar to the properties for all three rigid motions (translations, rotations, and reflections).

Prior Knowledge

GeometryRigid Motions
Geometry2-D Shapes

45 mins 8.G.A.5 8.G.A.2

EngagyNY Curriculum by engageny, used under CC-BY-SA 3.0