Math Doubts

Sides of a Triangle

The line segments that form a triangle by connecting their endpoints as a closed geometric shape is called the sides of a triangle.


sides of a triangle

The endpoints of three line segments can be connected as a closed geometric shape and it is called a triangle in geometry.

Each line segment acts as an edge or border of the triangle. In geometry, the edge or border is expressed by a word “side”. Hence, every line segment in any triangle is usually called as a side of the triangle.

There are three line segments in triangle. So, every triangle has three sides and their lengths can be equal or different.


sides of a triangle

Firstly, let’s construct a triangle with three line segments. You can take equal or unequal sides for constructing it.

Now, create a closed geometric shape by joining an endpoint of one line segment to an endpoint of another line segment. It forms a triangle geometrically and it is called $\Delta JKL$ in this example.

In this triangle, the line segments act as a border or edge. Hence, the word “side” is used to express a line segment in geometry.


representation of sides of a triangle

Mathematically, the line segments are written as $\overline{JK}$, $\overline{KL}$ and $\overline{LJ}$. In a triangle, the sides of triangle are line segments.

Therefore, the sides of the triangle are also written as $\overline{JK}$, $\overline{KL}$ and $\overline{LJ}$ mathematically.

Similarly, the lengths of sides of a triangle are also expressed as the way the lengths of line segments are expressed in mathematics.

Therefore, the lengths of the sides $\overline{JK}$, $\overline{KL}$ and $\overline{LJ}$ are written as $JK$, $KL$ and $LJ$ respectively.

Math Questions

The math problems with solutions to learn how to solve a problem.

Learn solutions

Math Worksheets

The math worksheets with answers for your practice with examples.

Practice now

Math Videos

The math videos tutorials with visual graphics to learn every concept.

Watch now

Subscribe us

Get the latest math updates from the Math Doubts by subscribing us.

Learn more

Math Doubts

A free math education service for students to learn every math concept easily, for teachers to teach mathematics understandably and for mathematicians to share their maths researching projects.

Copyright © 2012 - 2023 Math Doubts, All Rights Reserved