# Vertex Definition in Geometry: A Comprehensive Guide

## What is a Vertex?

A vertex is a point or corner of a geometric shape. In Euclidean geometry, the vertex is the point at which two or more lines meet – the point at which two sides of a shape meet. Vertices are usually labeled with uppercase letters, such as A, B, C, and so on. A vertex point is a single point that is part of a geometric shape and is one of the vertices of that shape.

In a triangle, for example, the three vertices form the corners of the triangle. In a square, the four vertices form the corners of the square. In a pentagon, the five vertices form the corners of the pentagon. Vertices can be found on two-dimensional shapes, such as circles, triangles, and squares, or on three-dimensional shapes, such as cubes, pyramids, and cylinders.

## Vertex Properties

A vertex can be described by its location, which is the coordinates of the point in space. It can also be described by its angle, which is the angle formed by two lines that meet at the vertex. A vertex can also be described by its length, which is the distance between two points on the same line that meet at the vertex. A vertex can also be described by its type, which is the shape of the surface that the vertex is located on.

In addition, a vertex can be described by its properties, which are the characteristics of the shape that the vertex is part of. These properties include the number of sides the shape has, the angles of the sides, and the area or perimeter of the shape. The properties of the vertex can also be used to identify the type of shape that the vertex is a part of.

## Vertex Examples

To understand the concept of a vertex further, let's look at some examples. In a triangle, the three vertices form the three corners of the triangle. In a square, the four vertices form the four corners of the square. In a pentagon, the five vertices form the five corners of the pentagon. In a hexagon, the six vertices form the six corners of the hexagon.

In a cube, the eight vertices form the eight corners of the cube. In a pyramid, the four vertices form the four corners of the pyramid. In a cylinder, the two vertices form the two ends of the cylinder. In a cone, the two vertices form the two ends of the cone.

## Vertex Practice Problems

1. What is the vertex of a triangle?

Answer: The vertex of a triangle is the point at which two sides meet.

2. What is the vertex of a square?

Answer: The vertex of a square is the point at which four sides meet.

3. What is the vertex of a pentagon?

Answer: The vertex of a pentagon is the point at which five sides meet.

4. What is the vertex of a hexagon?

Answer: The vertex of a hexagon is the point at which six sides meet.

5. What is the vertex of a cube?

Answer: The vertex of a cube is the point at which eight sides meet.

6. What is the vertex of a pyramid?

Answer: The vertex of a pyramid is the point at which four sides meet.

7. What is the vertex of a cylinder?

Answer: The vertex of a cylinder is the point at which two ends meet.

8. What is the vertex of a cone?

Answer: The vertex of a cone is the point at which two ends meet.

9. What is the vertex of an octagon?

Answer: The vertex of an octagon is the point at which eight sides meet.

10. What is the vertex of a dodecagon?

Answer: The vertex of a dodecagon is the point at which twelve sides meet.

## Summary

In this article, we discussed the vertex definition in geometry. A vertex is a point or corner where two or more lines meet, and it is usually labeled with uppercase letters. A vertex can be described by its location, angle, length, and type. We also looked at several examples of vertices in different shapes and provided 10 practice problems with answers.

## FAQ

### What is the meaning of vertex in geometry?

In geometry, a vertex is a point where two or more line segments meet, or a corner of a polygon or polyhedron.

### What is vertex example?

For example, the corners of a square or triangle are vertices. The intersection of two or more lines is also a vertex.