# Vertex

A vertex is where two or more line segments meet. A corner.

Plural of vertex is vertices (pronounced “ver-tiss-ease”).

A **verti**cal **X **(vertex) shows the X marking the high point. But in maths it’s even more precise. It is where there are corners, and or, where two or more lines meet.

**Example 1**

A pentagon has five vertices

**Example 2**

A square has four corners but these are four vertices too.

**Example 3 **

Where two lines meet is a vertex.

**Example 4 **

**Example 5**

A parabola can be thought of as two curves meeting, that is why mathematicians still call this a vertex. This can be the high point or low point of the graph.

**Example 6 **