For example, equilateral triangles have all congruent sides - that’s the definition of equilateral . All their angles are the same also, which makes them equiangular .

Equiangular tight frames (ETFs) have emerged as a central construct in modern applied and theoretical mathematics, providing optimal arrangements of lines in high-dimensional Hilbert spaces. By ...

Equiangular lines – sets of lines in Euclidean space that mutually share a fixed common angle – provide a natural context for examining spherical codes and optimisation problems.