In Module One, Transforming Geometric Objects engages students in transforming geometric objects using translations, reflections, rotations, and dilations. Students use rigid motion transformations to develop their understanding of congruence and extend that understanding to include similarity. They then use congruence and similarity, along with transformations, to establish geometric facts about triangles, similar triangles, and the relationships between special angles pairs formed when parallel lines are intersected by a transversal.

Throughout the module, students use transformations to build new knowledge and develop conceptual understanding of geometric concepts.