Unit 2, Lesson 1# Why Move Things Around?

EngageNY 45 min(s)

Students are introduced to vocabulary and notation related to rigid motions (e.g., transformation, image, and map). Students are introduced to transformations of the plane and learn that a rigid motion is a transformation that is distance-preserving. Students use transparencies to imitate a rigid motion that moves or maps one figure to another figure in the plane. The goal of this module is to arrive at a clear understanding of the concept of congruence (i.e., What does it mean for two geometric figures to have the same size and shape?).