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

properties of triangles and quadrilaterals

Focus The University of Tokyo

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

if ABC is an isosceles triangle and DBE is an equilateral triangle find each missing measure

Classifying triangles by angles (video)

Draw several triangles. In each triangle, construct the perp

What's the difference between an equilateral triangle and an isosceles right-angled triangle? - Quora

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

Are all isosceles triangles similar to each other? What about scalene or equilateral triangles? - Quora

Triangles - Equilateral, Isosceles and Scalene

properties of triangles and quadrilaterals

Are all isosceles triangles similar? + Example