three-dimensional figure
Definition
- Noun:
- A solid geometric form that has length, width, and height (depth): A "three-dimensional figure" is a shape that occupies space and can be measured in three perpendicular directions. It is also known as a solid figure or 3D shape.
Usage
- The term "three-dimensional figure" is used in mathematics, geometry, art, design, and everyday language to describe objects that are not flat.
- It is a formal and descriptive term. In casual conversation, people often simply say "3D shape" or specify the type of figure (e.g., a cube, a sphere).
Examples
- Noun:
- A cube, a sphere, and a pyramid are all examples of a three-dimensional figure.
- The artist sketched the basic form before adding details to the three-dimensional figure.
- In geometry class, we learned to calculate the volume of various three-dimensional figures.
Advanced Usage
- "To visualize a three-dimensional figure": To form a mental image of a solid shape, especially from a two-dimensional drawing.
- The engineering student had to learn to visualize a three-dimensional figure from its blueprint.
Variants and Related Words
- 3D figure (n): A common abbreviated form of "three-dimensional figure."
- Solid (n): In geometry, a synonym for a three-dimensional figure.
- Spatial figure (n): Another term emphasizing the figure's existence in space.
Synonyms
- Solid figure: A geometric solid.
- Volume: When referring to the shape itself in some technical contexts (e.g., "primitive volumes" in 3D modeling).
- Form: A more general term used in art and design.
Related Phrases
- Three-dimensional object: A very similar phrase, often used interchangeably in non-technical contexts.
- Three-dimensional geometry: The branch of mathematics dealing with such figures.
- Three-dimensional space: The realm in which these figures exist.
Notes
- The concept contrasts directly with a "two-dimensional figure" (or 2D shape), which has only length and width, like a square or circle.
- While "three-dimensional figure" is a single lexical unit (a compound noun), its meaning is directly derived from the sum of its parts: a that is .
Noun
-
a three-dimensional shape
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