Unit 1: Tools of Geometry

Unit one is about using tools to explain the congruence within and between polygons, focusing on triangles and regular polygons. Students will strategically use a variety of tools, including constructions and transformations, to justify the congruent relationships of sides, angles, and polygons. Developing fluency in construction is NOT an end in and of itself - it must connect to conceptual understanding.

Time frame:
6 weeks
Essential Questions: 
  • What does it mean for geometric figures to be congruent?
  • How are constructions and transformations used to understand and be more precise about congruence?
  • How are constructions used to understand and be more precise about rigid motion transformations?
Overall Unit Flow:
Initial Task Developmental Lessons Closure & Assessment
1 lesson 5 weeks (approximately 1 week per big idea) 1 week