# Square

In Euclidean geometry, a **square** is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, π/2 radian angles, or right angles). It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices *ABCD* would be denoted *ABCD*.[1]

Square | |
---|---|

Type | Regular polygon |

Edges and vertices | 4 |

Schläfli symbol | {4} |

Coxeter–Dynkin diagrams | |

Symmetry group | Dihedral (D_{4}), order 2×4 |

Internal angle (degrees) | 90° |

Properties | Convex, cyclic, equilateral, isogonal, isotoxal |