Little information was found for the Triangles groups.  Along with some info on Lucy Duran, I have only heard ‘My Oh My.’

Triangles (Herald Group) – Savin’ My Love/ ‘Tis A Pity, ’60 (Herald 549)

Triangles (NY Label) – Dance The Magoo/ Step Up And Go, ’62 (Fargo 1023)

Triangles (Hollywood Label) – My Oh My/ Really I Do, ’64 (Fifo 107) (ref Lucy Duran of Rosie and Ron (w Velveteens) on Donna 1338.)