Unit cube
A unit cube, sometimes called a cube of side 1, is a cube whose sides are 1 unit long. The volume of a 3-dimensional unit cube is 1 cubic unit, and its total surface area is 6 square units.
Unit Hypercube
The term unit cube or unit hypercube is also used to refer to hypercubes, or "cubes" in n-dimensional spaces, for values of n other than 3. In all dimensions, the unit cube has 2n corners.
Sometimes the term "unit cube" refers in specific to the set [0, 1]n of all n-tuples of numbers in the interval [0, 1]. The length of the longest diagonal of a unit hypercube of n dimensions is the square root of n.
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