# The Volume Formula of a Pyramid and Cone

##### This The Volume Formula of a Pyramid and Cone assessment also includes:

Our teacher told us the formula had one-third, but why? Using manipulatives, classmates try to explain the volume formula for a pyramid. After constructing a cube with six congruent pyramids, pupils use scaling principles from previous lessons to verify the formula and to show that it works for the general cone.

CCSS: Designed

##### Instructional Ideas

• To remind the class of the formula for a pyramid or cone, use the the demonstration that shows it takes three cones of water to fill a cylinder with the same base and height
##### Classroom Considerations

• The hands-on section in the opening requires the use of six congruent pyramids for each group or individual
• The purpose of the lesson is not what the formula is but why the formula has a one-third
• The eleventh installment in a 14-part series
##### Pros

• Exercises require the application of the volume formula
• Includes scaffolding suggestions for dividing the class into small groups for discussions

• None