Definition:Vertex (Geometry)
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Definition
A vertex is a point on the boundary of a geometric figure at which $2$ or more line segments meet.
Vertex of Polygon
A corner of a polygon is known as a vertex.
Thus, in the polygon above, the vertices are $A, B, C, D$ and $E$.
Vertex of Polyhedron
The vertices of a polyhedron are the vertices of the polygons which constitute its faces.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): vertex: 1. (plural vertices)
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): vertex: 1. (plural vertices)