A square with side lengths 1. The unit square usually means the one with coordinates (0, 0), (1, 0), (1, 1), (0, 1) in the real plane, or 0, 1, , and in the complex plane.
Unit Square
See also
Heilbronn Triangle Problem, Unit Circle, Unit Cube, Unit Disk, Unit Square IntegralExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Unit Square." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/UnitSquare.html