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单词 Digon
释义

Digon

中文百科

二角形

球面几何上的二角形

二角形(英文:Digon)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,并且不能在平面出绘出,只能够在曲面上绘画出二角形。此外,二角形可以被认为是一般多面体架构的表面退化。因此:平面几何中无法构建。

英语百科

Digon 二角形

A nonuniform truncated cuboctahedron with blue rectangular faces that degenerate into digons in the cubic limit.

In geometry, a digon is a polygon with two sides (edges) and two vertices. Its construction is degenerate in a Euclidean plane because the two sides would either coincide or one or both would have to be curved.

A regular digon has both angles equal and both sides equal and is represented by Schläfli symbol {2}. It may be constructed on a sphere as a pair of 180 degree arcs connecting antipodal points, when it forms a lune.

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