Unit 2
Congruence
Unit Narrative
In this unit, students prove a variety of figures congruent. They start with segments (2 vertices), then move on to triangles (3 vertices). Before starting this unit, students are familiar with rigid transformations and congruence from a previous unit. The triangle congruence theorems in this unit lay the foundation for triangle similarity in a later course.
The first section focuses on establishing congruence. Students recall from middle school that if two figures are congruent, then each pair of corresponding parts of the figures are also congruent. Next, students use rigid...