triangle

Noun

• a percussion instrument consisting of a metal bar bent in the shape of an open triangle

• any of various triangular drafting instruments used to draw straight lines at specified angles

• a small northern constellation near Perseus between Andromeda and Aries

• something approximating the shape of a triangle
  • the coastline of Chile and Argentina and Brazil forms two legs of a triangle
    

• a three-sided polygon

Related words

• Synonyms: 
  Triangulum , Triangle , trigon , trilateral