Why don't we call an equilateral triangle an isosceles triangle?

An Equilateral triangle is always an isosceles triangle is an isosceles triangle always an equilateral

Triangles

The University of Tokyo on LinkedIn: Why don't we call an equilateral triangle an isosceles triangle?

Focus The University of Tokyo

Are all equilateral triangles also isosceles triangles?

Proofs concerning equilateral triangles (video)

Universitas Tokyo di LinkedIn: Why don't we call an equilateral triangle an isosceles triangle?

Examples: Using the Properties of Isosceles Triangles to Determine Values

I am working on a woodworking project and I need to know these dimensions, I forgot how to work with Isosceles triangles, and I can't seem to find a problem similar to

4.5 Geometry - Isosceles and Equilateral Triangles

Isosceles and Equilateral Triangles

The University of Tokyo on LinkedIn: Why don't we call an equilateral triangle an isosceles triangle?

trigonometry equilateral triangle - Mathematics Stack Exchange

Isosceles and Equilateral Triangles