# Think 3-D Is Cool? Wait Till You Try 4-D!

Geometry Level 4

A lattice hypercube is a cube in 4-dimensional space, whose vertices are lattice points. Describe the set of possible side lengths of a lattice hypercube.

Note: A lattice point is a point whose coordinates are all integers. $$(0,0,1)$$ is a lattice point, but $$\left(\frac{1}{2}, \sqrt{2}, -0.2 \right)$$ is not a lattice point.

If you are interested in Lattice cubes, try the 3-D version.

For similar problems, you can read my note on Construction.

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