involving three parties or elements; "the triangular mother-father-child relationship"; "a trilateral agreement"; "a tripartite treaty"; "a tripartite division"; "a three-way playoff"
having three angles; forming or shaped like a triangle; "a triangular figure"; "a triangular pyrimid has a triangle for a base"
observe, check out, and look over carefully or inspect; "The customs agent examined the baggage"; "I must see your passport before you can enter the country"