The purpose of this lesson is for students to find the volume of figures composed of two non-overlapping right rectangular prisms by adding the volumes of the non-overlapping parts.
In the previous lesson, the figures students worked with showed the unit cubes, providing the opportunity to visualize the number of unit cubes and find volume in a variety of ways. In this lesson, the figures composed of two non-overlapping right rectangular prisms do not show the individual cubes. This encourages students to apply the volume formulas and make connections between expressions and the way the figures can be decomposed. Given an expression and a solid figure composed of two rectangular prisms, students determine how to decompose the figure to match the given expression (MP2, MP7).
- Find the volume of a figure composed of rectangular prisms in which unit cubes are not shown.
- Let’s find the volume of more figures.
Materials to Copy
- Isometric Dot Paper Standard
|Activity 1||20 min|
|Activity 2||15 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
What connections did students make between the different strategies shared? What questions did you ask to help make the connections more visible?
- Five in a Row: Multiplication (3–5), Stage 4: Three Factors (Addressing)
- Rolling for Fractions (3–5), Stage 1: Equivalent Fractions (Supporting)
Print Formatted Materials
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