A rectangular prism is a three-dimensional, box-shaped solid with six flat rectangular faces, twelve edges, and eight vertices; its dimensions and orientation may vary, and a cube is a special case whose faces are squares. Identification depends on these defining attributes rather than whether the solid is drawn in a familiar position or appears elongated. Volume, surface area, nets, and formal geometric classification are not included.
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Detailed Explanation: Identify rectangular prisms
A rectangular prism is a solid shape like a box.
Look for these features:
- It has 6 flat faces.
- The faces are rectangles.
- It has 12 edges.
- It has 8 corners (also called vertices).
The shape can be turned or placed in any position. A cube is also a rectangular prism because its square faces are special rectangles.
Example
A toy box is turned on its side. It has:
- 6 flat faces
- 12 edges
- 8 corners
Is the toy box a rectangular prism?
Step 1: Check the faces.
The toy box has 6 flat faces, and each face is a rectangle.
Step 2: Check the edges and corners.
It has 12 edges and 8 corners.
Step 3: Decide.
All the important features match, so the toy box is a rectangular prism.
Remember: A box is still a rectangular prism even when it is turned or looks tall, short, or wide.
Learn by doing: Identify rectangular prisms
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Practice:
Identify Shapes 3D - Count Rectangular Prisms
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Download/Modify Free Grade 1 'Identify rectangular prisms' Worksheet
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This Worksheet Includes:
- Identify Shapes 3D - Count Rectangular Prisms
- Identify Shapes 3D - Count Rectangular Prisms (Real World)
- Simple 3D Shapes
- Identify Shapes 3D - Count Cubes
- Identify Shapes 3D - Count Cubes (Real World)
Units Teaching This Skill
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