Tesseract | Brilliant Math & Science Wiki
https://brilliant.org/wiki/tesseract/
WEBTesseract. Arron Kau contributed. A tesseract, also known as a hypercube, is a four-dimensional cube, or, alternately, it is the extension of the idea of a square to a four-dimensional space in the same way that a cube is the extension of the idea of a square to a three-dimensional space.
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