Trostrana geometrijska slika.
ETYM Latin triangulum, from triangulus triangular; tri- (see Tri-) + angulus angle: cf. French triangle. Related to Angle a corner.
1. A percussion instrument consisting of a metal bar bent in the shape of an open triangle.
2. A three-sided polygon; SYN. trigon, trilateral.
3. Any of various triangular drafting instruments used to draw straight lines at specified angles.