Instructional Activity# Cones with Unknown Dimensions

Lesson 16. Unit 5. Grade 8 Open Up Resources

Open Up Resources15 min(s)

This Instructional Activity is a part of the Lesson 16, Unit 5, Grade 8. The purpose of this activity is for students to use the structure of the volume formula for cones to calculate missing dimensions of a cone given other dimensions. Students are given the image of a generic cylinder with marked dimensions for the radius, diameter, and height to help their reasoning about the different rows in the table. While completing the table, students work with approximations and exact values of \pi as well as statements that require reasoning about squared values.