In Euclidean geometry, a square is a regular quadrilateral, which means that it has four sides of equal length and four equal angles. It can also be defined as a rectangle with two equal-length adjacent sides. Wikipedia
Number of edges: 4
Line of symmetry: 4
Rotational symmetry order: 4
Sum of interior angles: 360°
Symmetry group: Dihedral (D₄) and order 2×4
Number of vertices: 4