Desig Triangular

d(x,z) ≤ d(x,y)+d(y,z).
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

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About this calculator

The Triangular Inequality is a fundamental concept in topology and mathematics in general. It states that for any three points x, y, and z in a metric space, the distance between x and z is less than or equal to the sum of the distances between x and y and between y and z. This can be expressed as d(x,z) ≤ d(x,y) + d(y,z).

This inequality is important because it ensures that the distance between two points is always a reasonable and intuitive measure. For example, if you are in a city and want to go to another city, passing through a third city, the total distance traveled will always be greater than or equal to the direct distance between the two cities.

The Triangular Inequality is used in various fields, such as data analysis, graph theory, and geometry. It is also a fundamental property of metric spaces, which are used to describe spaces with a notion of distance.

It is worth noting that the Triangular Inequality is not satisfied by all distance measures. For example, if we consider the distance between two points in a space with a non-Euclidean metric, the inequality may not be valid.

Frequently asked questions

What is the Triangular Inequality?

The Triangular Inequality is a mathematical property that states that the distance between two points is less than or equal to the sum of the distances between the intermediate points.

Why is the Triangular Inequality important?

The Triangular Inequality is important because it ensures that the distance between two points is always a reasonable and intuitive measure.

Is the Triangular Inequality valid for all distance measures?

No, the Triangular Inequality is not satisfied by all distance measures.

In which areas is the Triangular Inequality used?

The Triangular Inequality is used in various fields, such as data analysis, graph theory, and geometry.

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