(of physical extension)
(all right angles, same lengths)
| Dimension | thing | measure
(of physical extension) | regular object
(all right angles, same lengths) | Examples | |
|---|---|---|---|---|---|
| 0D | point | (none) | · |
| |
| 1D | line (curve) | length |
| line segment | curves:
|
| 2D | plane. region (surface) | area. length unit2 |
| square | surfaces:
|
| 3D | space | volume. length unit3 | cube |
| |
| 4D | can't "see" it. Exists mathematically. Each dimension is a variable, eg. time,$,calories,length,weight etc. | tesseract/hypercube | The Universe (space-time) | ||
| 5,6...∞ | "get used to it" |