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

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Credit Note

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.

Classwork

• Estimation – Side Length 1
• Warm Up
• Google Slides
• Activity
  • Diagram to manipulate
• Spiraling Practice

Answers

• Link to Answers

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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