Square root of 5 one, when traversing the cube "surface" (the shortest distance when traversing through the "inside" of the cube corresponds to the length of the cube diagonal, which is the square root of three times the edge). The number can be algebraically and geometrically related to and , as it is the length of the hypotenuse of a right triangle with catheti measuring and (again, the Pythagorean theorem proves this). Right triangles of such proportions can be found inside a cube: the sides of any triangle defined by the centre point of a cube, one of its vertices, and the middle point
Cube Zero forest with her daughter. Rains wakes up in the Cube and meets the other occupants: one of them, Robert Haskell, has the same tattoo on his forehead as the soldier who captured her. However, Haskell, like everyone else, only knows his own name and has no recollection of his former life or how he got there. According to what Wynn and Dodd know, everyone in the Cube faced a death sentence and volunteered to partake in psychological experiments instead. Rains' consent form, however, is not found in her file. The captives venture through the Cube, testing each room for traps