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CPM Course 2 – Chapter 9

Circles and Volume

In this chapter, students investigate the relationship between the circumference and diameter for circles. They find the relationship to be proportional with π as a multiplier. The themes are circles and volume. During this chapter:

  • Students will  find the area of composite shapes built from triangles, circles, and other shapes and apply this to finding the volume of right prisms.
  • Students will learn strategies for calculating the volume of a prism.

Homework help for this chapter is here

Homework help offers tips, strategies and sometimes solutions for every homework question in this chapter.


  • Parent Guide from CPM for this chapter is here
  • Khan academy videos on circles are here and volume here