Eternal triangle is a type of love triangle.

The term Eternal triangle can also refer to: Eternal Triangle, a London based pop group "Eternal Triangle", a jazz standard by Sonny Stitt, recorded on the album Sonny Side Up The Eternal Triangle, an album by trumpeters Freddie Hubbard and Woody Shaw The Eternal Triangle (film), a 1917 British silent romance film

See also Love triangle (disambiguation)