Unit 7

Transformations, Congruence & Similarity

Rigid motions, dilations, and similarity. Algebra I later reuses these ideas as function transformations.

Grade 8 State Test

Essential question: Which moves preserve size and shape, and which only preserve shape?

Rigid motions (translations, rotations, reflections) produce congruent figures. Dilations produce similar figures.

NY-8.G.1 · NY-8.G.2 · NY-8.G.3 · NY-8.G.4