a. A cube with side length 1 unit, called a “unit cube,” is said to have “one cubic unit” of volume, and can be used to measure volume.

b. A solid figure which can be packed without gaps or overlaps using n unit cubes is said to have a volume of n cubic units.

Title | Description | Thumbnail Image | Curriculum Topics |
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## VIDEO: 3D Geometry Animation: Cube |
This animated sequence shows a cube from top to bottom. |
3-Dimensional Figures, Cubes | |

## Definition--3D Geometry Concepts--Antiprism |
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## Definition--3D Geometry Concepts--AntiprismThis is a collection of definitions related to 3D figures and their properties. This includes definitions and examples of 2D nets of 3D figures, as well as 2D cross-sections of different 3D figures. |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Apex |
##
## Definition--3D Geometry Concepts--ApexThis is a collection of definitions related to 3D figures and their properties. This includes definitions and examples of 2D nets of 3D figures, as well as 2D cross-sections of different 3D figures. |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Base (Geometry) |
##
## Definition--3D Geometry Concepts--Base (Geometry)This is a collection of definitions related to 3D figures and their properties. This includes definitions and examples of 2D nets of 3D figures, as well as 2D cross-sections of different 3D figures. |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Cone |
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## Definition--3D Geometry Concepts--Cone |
Cones | |

## Definition--3D Geometry Concepts--Cross-sections of a Cube |
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## Definition--3D Geometry Concepts--Cross-sections of a Cube |
Cubes | |

## Definition--3D Geometry Concepts--Cross-Sections of a Sphere |
##
## Definition--3D Geometry Concepts--Cross-Sections of a Sphere |
Spheres | |

## Definition--3D Geometry Concepts--Cube |
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## Definition--3D Geometry Concepts--Cube |
Cubes | |

## Definition--3D Geometry Concepts--Cylinder |
##
## Definition--3D Geometry Concepts--Cylinder |
Cylinders | |

## Definition--3D Geometry Concepts--Edge |
##
## Definition--3D Geometry Concepts--Edge |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Face |
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## Definition--3D Geometry Concepts--Face |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Cone |
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## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Cone |
Cones | |

## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Cylinder |
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## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Cylinder |
Cylinders | |

## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Square Pyramid |
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## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Square Pyramid |
Pyramids | |

## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Triangular Prism |
##
## Definition--3D Geometry Concepts--Horizontal Cross-Sections of a Triangular Prism |
Triangular Prisms | |

## Definition--3D Geometry Concepts--Net |
##
## Definition--3D Geometry Concepts--Net |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Net for a Cube |
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## Definition--3D Geometry Concepts--Net for a Cube |
Cubes | |

## Definition--3D Geometry Concepts--Net for a Dodecahedron |
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## Definition--3D Geometry Concepts--Net for a Dodecahedron |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Net for a Pyramid |
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## Definition--3D Geometry Concepts--Net for a Pyramid |
Pyramids | |

## Definition--3D Geometry Concepts--Net for a Rectangular Prism |
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## Definition--3D Geometry Concepts--Net for a Rectangular Prism |
Rectangular Prisms | |

## Definition--3D Geometry Concepts--Net for a Tetrahedron |
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## Definition--3D Geometry Concepts--Net for a Tetrahedron |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Net for a Triangular Prism |
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## Definition--3D Geometry Concepts--Net for a Triangular Prism |
Triangular Prisms | |

## Definition--3D Geometry Concepts--Net for an Antiprism |
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## Definition--3D Geometry Concepts--Net for an Antiprism |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Net for an Icosahedron |
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## Definition--3D Geometry Concepts--Net for an Icosahedron |
3-Dimensional Figures | |

## Definition--3D Geometry Concepts--Net for an Octahedron |
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## Definition--3D Geometry Concepts--Net for an Octahedron |
3-Dimensional Figures |