Follow Us on Twitter

Scalene Triangles (Mathematics Glossary)

What Is a Scalene Triangle?

A scalene triangle is a triangle where none of the sides or angles are equal.



Dictionary Definition

The Merriam-Webster dictionary defines a scalene triangle as "having the three sides of unequal length."

Real Examples of Scalene Triangles

Below are real examples of scalene triangles.



In each case
  • No sides are the same length
  • No angles are the same (60°)
Curriculum
Geometry Lessons
Interactive Test
  show
 


Here's a second test on scalene triangles.
Here's a third test on scalene triangles.
Note

What's in a Name?

'Scalene' comes from the Greek word 'skalenos', meaning 'unequal'.

Interior Angles of a Scalene Triangle

The interior angles of any triangle add up to 180°.

In a scalene triangle, the angles are all different.

Symmetry of a Scalene Triangle

A scalene triangle has no lines of symmetry.

Other Types of Triangle

Scalene triangles are one type of triangle.

There are also: