# **Definition of Vertex**

At the request of **Geometry,** the **vertex** is the **point at which the two sides of an angle or three or more planes coincide** . Also, the **apex of a cone or a pyramid is called the vertex** . And the **point of a curve in which the curvature reaches a maximum or minimum point** is called a vertex.

On the other hand in the **Theory of the Graphs** , which is the one that **studies the properties of the graphs** , the vertices turn out to be the fundamental units that make up the mentioned graphs (non-empty set of vertices). In the case of **non-directed graphs,** they are composed of vertices and edges (unordered pairs of vertices), instead, the **directed graphs** are composed of vertices and arcs, which are ordered pairs of vertices.

On the other hand, in addition to Geometry, the term presents a recurring use in the fields of **Cartography and Topography** , since it designates the **point of a surface that exceeds in altitude all the other points immediately adjacent to the same** . Therefore, the word stands as a synonym for the word top or the word summit, referring to the highest part of a mountain , for example.

And this is just the other use of the word, to account for **the highest point or point that a thing presents.** *Incredibly, much earlier than expected, climbers reached the apex of the mountain* .

Meanwhile, the **geodetic vertex** is that signal that is used to indicate an exact position that is part of a network of triangles, formed in turn by other geodetic vertices.

And in **Anatomy** when talking about vertex it will be referring to **that highest part of the head of vertebrates and arthropods** . In humans, the cranial vertex is made up of the frontal bone, the parietal bones and the occipital bone joined together, by means of the coronary suture, the sagittal suture and the lambdoid suture.