Research any topic before you write.
Find related topics. | Discover entities. | See connections. | Build a topical map.
Internal and external angles: Extension to polyhedra, Extension to crossed polygons & Properties
In geometry, an angle of a polygon is formed by two adjacent sides. For a simple polygon (non-self-intersecting), regardless of whether it is convex or non-convex, this angle is called an internal angle (or interior angle) if a point within the angle is in the interior of the polygon. A polygon has exactly one internal angle per vertex.
Language: English [EN]
