Math Curriculum

Level D
Unit: Geometry
Key Lesson 7.3.3 Exploring Circumference

Lesson topic: Explore diameter and circumference

Instructor Materials

  • Teacher guide
  • Slides
  • Practice Problems resource
  • CCRS standard: 7.G.4, 7.RP.2, 7.RP.2a
  • Learning goal: Comprehend the word “pi” and the symbol to refer to the constant of proportionality between the diameter and circumference of a circle. Create and describe (in writing) graphs that show measurements of circles. Generalize that the relationship between diameter and circumference is proportional and that the constant of proportionality is a little more than 3.
  • 7.3 Assessment and Practice Problems

Student Materials

Related Lessons


If students need additional lessons before this key lesson, use these supplemental lessons.




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