Vertex (geometry) - Wikipedia
https://en.wikipedia.org/wiki/Vertex_(geometry)
OverviewNumber of vertices of a polyhedronDefinitionPrincipal vertexVertices in computer graphicsSee alsoExternal linksAny convex polyhedron's surface has Euler characteristic where V is the number of vertices, E is the number of edges, and F is the number of faces. This equation is known as Euler's polyhedron formula. Thus the number of vertices is 2 more than the excess of the number of edges over the number of faces. For example, since a cube has 12 edges and 6 faces, the formula implies that it has eight vertices.
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