Grade 8 · Unit 10

Congruence via Rigid Motions

The transformational definition

Curriculum standard — Represent stage of the Thinking Ladder

Multiple representations

The symbolic form of this concept.

Three pathways, one topic

Study congruence via rigid motions at three depths

Grade/course-level problems with full understanding.

Parameters, multiple representations, proof, and modeling.

Non-routine problems and competition applications.