Equilateral triangle
An equilateral triangle is a triangle whose all three sides are of equal length.
The sides of an equilateral triangle are congruent, which means that all sides are of equal length(AB=BC=CA).
All the interior angles are equal too (α=β=γ=60 degrees).
Here are some games with triangles:
https://www.iknowit.com/lessons/e-classifying-triangles-equilateral-isosceles-scalene.html https://cardgames.io/triangles/