Geometry

Lesson 13

Math

Unit 7

6th Grade

Lesson 13 of 17

Objective


Apply volume concepts to solve real-world and mathematical problems, including finding volume of figures with composite prisms.

Common Core Standards


Core Standards

  • 6.G.A.2 — Find the volume of a right rectangular prism with fractional edge lengths by packing it with unit cubes of the appropriate unit fraction edge lengths, and show that the volume is the same as would be found by multiplying the edge lengths of the prism. Apply the formulas V = l w h and V = b h to find volumes of right rectangular prisms with fractional edge lengths in the context of solving real-world and mathematical problems.

Foundational Standards

  • 5.MD.C.5.C
  • 5.NF.B.6

Criteria for Success


  1. Understand that a three-dimensional figure can be decomposed into separate shapes, just like a two-dimensional figure, and that volume is additive. 
  2. Find the volume of composite three-dimensional figures composed of rectangular prisms. 
  3. Solve real-world problems using volume formulas and concepts.

Tips for Teachers


  • In fifth grade, students learned that volume is additive and found the volume of 3D figures composed of non-overlapping rectangular prisms with whole number side lengths. In this lesson, students extend on that idea to solve real-world problems with composite shapes with fractional side lengths. 
  • With multiple parts and partial volumes, it will be important for students to stay organized in order to understand their work and to check their answers. Students can use numerical expressions as one way to organize their work.
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Anchor Problems

25-30 minutes


Problem 1

Some moving trucks include an additional storage space called a “Mom’s Attic.” It is located above the driver and passenger seats.

The dimensions of the truck’s storage space are shown below in feet. How many cubic feet of space does the truck hold? 

Guiding Questions

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Student Response

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Problem 2

A special-order sandbox has been created for children to use as an archeological digging area at the zoo. Determine the volume of the sandbox. (Figure not drawn to scale.)

Guiding Questions

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Student Response

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References

EngageNY Mathematics Grade 6 Mathematics > Module 5 > Topic D > Lesson 14Example 2

Grade 6 Mathematics > Module 5 > Topic D > Lesson 14 of the New York State Common Core Mathematics Curriculum from EngageNY and Great Minds. © 2015 Great Minds. Licensed by EngageNY of the New York State Education Department under the CC BY-NC-SA 3.0 US license. Accessed Dec. 2, 2016, 5:15 p.m..

Problem Set

15-20 minutes


Give your students more opportunities to practice the skills in this lesson with a downloadable problem set aligned to the daily objective.

Target Task

5-10 minutes


A smaller cube sits on top of a larger cube. The combined height of both cubes is 4 inches and the larger cube has a side length of $$2\frac{1}{2}$$ inches. Find the combined volume of both cubes.

Student Response

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Additional Practice


The following resources include problems and activities aligned to the objective of the lesson that can be used for additional practice or to create your own problem set.

  • Include examples such as 
    • Two differently sized boxes stacked on top of one another—find the volume of both
    • A swimming pool with a deep end and a shallow end
    • A mix of problems where students are given the area of the base(s)

Next

Describe features of and identify nets that match prisms and pyramids.

Lesson 14
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Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Area of Triangles, Quadrilaterals, and Polygons

Topic B: Polygons in the Coordinate Plane

Topic C: Volume of Rectangular Prisms

Topic D: Nets and Surface Area

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