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### What is a Vertex?

```
Date: 12/06/2001 at 21:11:39
From: Sarah
Subject: Vertices

What does vertices mean?
```

```
Date: 12/07/2001 at 09:53:55
From: Doctor Sarah
Subject: Re: Vertices

Hi Sarah - thanks for writing to Dr. Math.

The vertex is the point at which two rays of an angle or two edges of
a polygon meet.

/
/
/  The vertex is the point about which the angle is
/   measured.
vertex /___________

The plural of vertex is vertices.

vertex
/\
/  \
/    \
/      \
/        \
vertex /__________\ vertex

A triangle has three vertices.

- Doctor Sarah, The Math Forum
http://mathforum.org/dr.math/
```
Associated Topics:
Elementary Definitions
Elementary Geometry
Elementary Triangles and Other Polygons
Elementary Two-Dimensional Geometry
Middle School Definitions
Middle School Geometry
Middle School Triangles and Other Polygons
Middle School Two-Dimensional Geometry

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