👉 An undersquare is a term used in mathematics, specifically geometry, that refers to an area or volume of a shape that is half the size of the original shape. It can be defined as: \[ \text{Undersquare} = \frac{1}{2} \times \text{Original Shape Area} \] For example, if we have a square with side length 4 units, then its undersquare would be: \[ \text{Undersquare} = \frac{1