せいほうけい正方形seihoukei
1.
A four-sided geometric figure where all sides are of equal length and each of the interior angles measures 90 degrees, characterized by its symmetry and uniformity.
2.
A specific type of quadrilateral that is both equilateral and equiangular, often used in mathematics and design to denote a shape with consistent proportions.
Example:
正方形は４つの同じ長さの辺をもつ。