tri·an·gu·lar 
(trī-ănggyə-lər)
(trī-ănggyə-lər)adj.
1. Of, relating to, or shaped like a triangle.
2. Having a triangle for a base: a triangular pyramid.
3. Relating to or involving three entities, such as three people, objects, or ideas.
tri·an′gu·lari·ty (-lărĭ-tē) n.
tri·angu·lar·ly adv.