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7th Grade Math

Examples, solutions, videos, and worksheets to help grade 7 students to compute volumes of three-dimensional objects composed of right prisms by using the fact that volume is additive.

Printable “Volume of Prisms” Worksheets:

Volume of Rectangular Prisms

Volume of Composite Rectangular Prisms

Volume of Rectangular Prisms Word Problems

Volume of Prisms

Volume of Composite Prisms

Volume of Prism Word Problems

Composite prisms are three-dimensional shapes that consist of two or more connected prisms. A composite prism is a solid made up of two or more simpler prisms joined together. To find its volume, we break it down into its component parts.

Steps to Find the Volume of a Composite Prism:

- Identify the Component Prisms: Determine the individual prisms that make up the composite shape.
- Calculate the Volume of Each Prism: Use the formula for the volume of a prism (Volume = Base Area × Height) for each individual prism.
- Combine the Volumes: Add the volumes of all the individual prisms to find the total volume of the composite prism.

Useful Tips:

- Visualize the Composite Prism: Draw or imagine the composite figure, labeling all relevant dimensions.
- Use the Correct Formulas: Ensure you use the appropriate volume formula for each prism.
- Add or Subtract Correctly: If the prisms are joined together, add their volumes. If a part is removed (cut-out), subtract its volume.
- Check Units: Make sure all measurements are in the same units before performing calculations

Have a look at this video if you need to review how to find the volume of composite solids.

Click on the following worksheet to get a printable pdf document.

Scroll down the page for more **Volume of Composite Prism Worksheets**.

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(Answers on the second page.)

Volume of Composite Prism Worksheet #1

Volume of Composite Prism Worksheet #2

Volume of Composite Prism Worksheet #3

Volume of Composite 3-D Objects

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