Rigid Motions & Congruence

Lesson Prep

Lesson Details

• Duration: 50 minutes

• Learning Goal: Develop understanding of congruence by connecting it with rigid transformations.

Answer Keys

• Link to Answer Keys

Classwork

• Estimation – Side Length 1

• Warm Up

• Google Slides

• Activity

  • Diagram to manipulate

• Spiraling Practice

Credits

Pretty much this whole lesson was taken from Marisa Laks. A big thank you goes to Lisa Bejarano as well for putting the lesson on her Geometry Planning Guide.

Standards

Common Core

• HSG.CO.B – Understand congruence in terms of rigid motions

TEKS

• G.5(A) – investigate patterns to make conjectures about geometric relationships, including angles formed by parallel lines cut by a transversal, criteria required for triangle congruence, special segments of triangles, diagonals of quadrilaterals, interior and exterior angles of polygons, and special segments and angles of circles choosing from a variety of tools

• G.6(C) – apply the definition of congruence, in terms of rigid transformations, to identify congruent figures and their corresponding sides and angles