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Unit 1:

Tools of Geometry

What does it mean for geometric figures to be congruent?
6 weeks

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.

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?
Printable Unit Plan
  • Geometry Unit Plan for Unit 1
    Resource:
    Geometry Unit Plan for Unit 1

    This is a printable version of the entire unit plan. You can make a copy of it and edit it or download and print it as needed.

Unit Outline

9 Components

Every unit begins with an Initial Task and ends with a Balanced Assessment, both focusing on core mathematics of the unit. The core mathematics is developed through a series of resources around Big Ideas; as you move through the unit, keep students focused on how these ideas are connected and how they address mathematical problem solving. Before attempting the Balanced Assessment, students have an opportunity to synthesize their knowledge through a multi-day Formative Assessment Lesson and teacher-designed re-engagement lessons.

Initial Task See 1 itemHide 1 item

Formative Assessment Lesson See 1 itemHide 1 item

Re-engagement See 1 itemHide 1 item

End of Unit Assessment See 1 itemHide 1 item