Counting Boundaries

(none) |
2 points |
4 edges |
6 squares |
8 cubes |
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0D | 1D | 2D | 3D | 4D |

The boundary of the $n$-cube is $2n$ copies of the $(n-1)$-cube.

The surface of the hypercube should be 8 cubical faces.

The surface of the hypercube should be 8 cubical faces.