## Unit Focus

Selling Geometry is an introductory project that addresses priority CCSS for Unit 1, Traditional Geometry, and Unit 5, Integrated Math Pathways.

It also focuses students on becoming familiar with the eight Mathematical Practices established in the CCSS, and on practicing two key 21st Century skills: teamwork and communication.

You can explore the CCSS here.

In addition, students will practice using online technologies and other resources for geometry. If you want to review the project outcomes again, go back to the Overview of Assessment.

## Timeline & Duration

- 5 weeks, based on approximately 5 hours of class time per week
- Project Rating: Beginner

## Critical Area

In Selling Geometry, students establish triangle congruence criteria, based on analyses of rigid motions and formal constructions. They use triangle congruence as a familiar foundation for the development of formal proof. Students solve problems about triangles, quadrilaterals, and other polygons. They apply reasoning to complete geometric constructions and explain why they work.