File:Square_with_offset_tick_marks.svg · Wikimedia Commons · See Wikimedia Commons

EntityQ164· pop 151· linked from 1,146 articles

正方形

Sign in to save

Also known as 2-orthoplex, bicross, 2-cube, 2-cross-polytope, regular quadrilateral

邊長和內角相等的四邊形

AI overview

A square is a four-sided shape where all sides are equal in length and all corners form right angles (90 degrees). Squares matter because they're fundamental in geometry and mathematics—their properties are used to calculate area, and the concept of "squaring" a number (multiplying it by itself) is named after this shape's mathematical importance.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Polygon.name: Square
Polygon.image: Square with offset tick marks.svg
Polygon.caption: A square. The blue ∟ annotations mark equal right angles at its vertices and the red // annotations mark equal side lengths.
Polygon.edges: 4
Polygon.symmetry: order-8 dihedral
Polygon.area: side2
Polygon.angle: /2 (90°)
Polygon.perimeter: 4 · side

via Wikipedia infobox

Article · 中文

在平面几何学中，正方形是四邊相等且四個角是直角的四邊形。正方形是正多边形的一种：正四边形。四个顶点为ABCD的正方形可以记为 ABCD。正方形是二维的超方形，也是二维的正轴形。

Abstract from DBpedia / Wikipedia · CC BY-SA

Gallery (48)

Available in 147 languages

Show 128 more

via Wikidata sitelinks · CC0