4, Lesson 18, Unit 5, Grade 8, OpenUp icon
Instructional Activity

Playing with Cones

Lesson 18. Unit 5. Grade 8 Open Up Resources

Open Up Resources15 min(s)

This Instructional Activity is a part of the Lesson 18, Unit 5, Grade 8. In this activity, students continue working with function representations to investigate how changing the radius affects the volume of a cone with a fixed height. Students represent the relationship between the volume of the cone and the length of its radius with an equation and graph. They use these representations to justify what they think will happen when the radius of the cylinder is tripled. The work students did in the previous activity prepared them to use the equation to see the effect that tripling the radius has on the volume of the cone. Identify students who use the equation versus the graph to answer the last question.

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