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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 
Initial Task  Developmental Lessons  Closure & Assessment 

1 lesson  5 weeks (approximately 1 week per big idea)  1 week 

Formative Assessment Lesson: Reengagement: Final Task: 