In geometry, a bigon, [1] digon, or a 2-gon, is a polygon with two sides and two vertices. Its construction is degenerate in a Euclidean plane because either the two sides would coincide or one or both would have to be curved; however, it can be easily visualised in elliptic space.

二角形（英语：Digon）又称二边形是在几何学中的一种多边形。 只有2条 边 和2个 顶点 互相之间的连接的多边形，可以在平面处绘出，但仅为两条等长而互相重叠的线段，两个顶点为线段之两端，形成零度内角。

A digon is a polygon with two sides. It is degenerate if embedded in Euclidean space, as its edges coincide. It can however be thought of as a tiling of the circle. In two-dimensional or higher spherical space, it can form a lune such as the ones making up a hosohedron.

In geometry, a digon (or bigon) is a polygon with two sides (edges) and two corners (vertices). In Euclidean space, the two sides would have to be on the exact same area, giving the digon zero area. One or both sides could be curved instead, but then it would not be a polygon. This means the digon is said to be degenerate.

正二边形（digon）是一个二位退化正多边形，有两个点和二个边。 （在 欧几里德空间 中，这两个边是重叠的，且它 面积 为0，但在球形空间中，边就不一定重叠，且可以有面积）同时它也是半截 正方形。 运用二次函数图象知识亦可求证。 在 欧式空间 中，由于二边形两边重叠，所以它必然是正的。 同时，它不符合 多边形内角和定理 所导出的外角定理（内角和定理还是符合的）。 但在球形空间中就不一样了，由于两边不一定重叠，二边形也不一定是正的。 它也是半截正方形， …

In geometry, a digon is a degenerate polygon with two sides (edges) and two vertices. A digon must be regular because its two edges are the same length. It has Schläfli symbol {2}. In Euclidean geometry a digon is always degenerate.

A digon is a polygon with two vertices and two sides. This category has the following 2 subcategories, out of 2 total. The following 8 files are in this category, out of 8 total.

6 天之前 · The digon is the degenerate polygon (corresponding to a line segment) with Schläfli symbol. See also Biangle , Dihedron , Hosohedron , Full Angle , Line Segment , Polygon , Trigonometry Angles-- pi /2

Digon (Wikipedia) In geometry, a bigon, digon, or a 2-gon, is a polygon with two sides (edges) and two vertices. Its construction is degenerate in a Euclidean plane because either the two sides would coincide or one or both would have to be curved; however, it …

2024年4月26日 · A monogon, a theoretical polygon with one side and one vertex, is considered an abstraction in geometry, whereas a digon, with two sides and two vertices, can exist under non-Euclidean geometry but not in a Euclidean setting.