File:Square_with_offset_tick_marks.svg · Wikimedia Commons · See Wikimedia Commons
Also known as 2-orthoplex, bicross, 2-cube, 2-cross-polytope, regular quadrilateral
4つの辺の長さと4つの角の角度が全て等しい四角形
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 · 日本語
正方形(せいほうけい、英: square)または正四角形(せいしかくけい、せいしかっけい)は、平面上の幾何学において、4つの辺の長さが全て等しく、かつ、4つの角の角度が全て等しい四角形のこと。従って、4つの角は全て直角(90度)になっている。日常語では真四角(ましかく)とも呼ぶ。 正方形は正多角形の一種であり、また長方形、菱形、凧形、平行四辺形、台形の特殊な形だと考えることもできる。 面積の単位である平方メートルは、一辺1mの正方形の面積と定義される。1cm2、1km2なども同様である。
Abstract from DBpedia / Wikipedia · CC BY-SA
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