Spatial polygons
Overview
Important
A spatial polygon is a closed chain of straight line segments (edges) joining a sequence of points (vertices) in three-dimensional space, where not all the vertices are coplanar. Unlike plane polygons, spatial polygons cannot be contained within a single plane.
Important properties
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Spatial polygons can have the same number of sides as plane polygons, but their vertices are not all in the same plane.
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The simplest spatial polygon is a skew quadrilateral (a quadrilateral with vertices not all in one plane).
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Spatial polygons are important in the study of polyhedra, as the faces of polyhedra are plane polygons, but the edges and vertices can form spatial polygons.