The latter definition would make all equilateral triangles isosceles triangles.
From the en.wikipedia.org
Binomial opinions can be represented on an equilateral triangle as shown below.
From the en.wikipedia.org
Make an equilateral triangle, the third point of which is the south celestial pole.
From the en.wikipedia.org
Make a large equilateral triangle using these stars for two of the corners.
From the en.wikipedia.org
Another dramatic example of surface chemistry is the production of equilateral triangles.
From the sciencedaily.com
Cut from one vertex to the center to make an equilateral triangular flap.
From the en.wikipedia.org
They do not sit atop an equilateral triangle with left and right represented as angles below.
From the theatlantic.com
It is not usually considered a triambus, although it is equilateral.
From the en.wikipedia.org
The format of this Chapelle aux Dames is a huge table in the form of an equilateral triangle.
From the time.com
More examples
A figure whose sides are all equal
Having all sides or faces equal
In geometry, an equilateral polygon is a polygon which has all sides of the same length.
An equilateral triangle; Referring to a polygon all of whose sides are of equal length. Not necessarily a regular polygon since the angles can still differ (a regular polygon would also be equiangular)
Each side equal to the other--refers to brachiopod symmetry. See symmetry figure.
Refers to a figure in which all sides have the same length.
A polygon is equilateral if all the sides are equal in length.
Having the UMBO at the center of the dorsal midline of the valve (figure: Tucetona pectinata).