Used mainly in international relations and formal agreements involving three parties. The trilateral trade talks affected the three countries' economies.
Pro Tip 2/3
Not Always Geometric
Though it suggests three sides, it's not limited to physical shapes but also to conceptual or political sides. The trilateral agreement addressed security, trade, and environment.
Pro Tip 3/3
Equal Stakes
It implies that all three parties have equal importance or stakes in the matter at hand. Each nation contributed equally in the trilateral defense pact.