Final project discusses the concept of quasi-ideals in more general structures, namely seminear-rings and ternary seminear-rings. In determining quasi-ideals in seminear-rings and ternary seminear-rings, de_nitions and theorems related to the structure of seminear-rings and ternary seminear-rings and their res- pective ideal concepts are provided, as well as subseminear-rings and ternary subsem…