- a three-sided polygon
- something approximating the shape of a triangle; "the coastline of Chile and Argentina and Brazil forms two legs of a triangle"
- Triangulum: a small northern constellation near Perseus between Andromeda and Aries
- any of various triangular drafting instruments used to draw straight lines at specified angles
- a percussion instrument consisting of a metal bar bent in the shape of an open triangle
- A triangle is one of the basic shapes of geometry: a polygon with three corners or vertices and three sides or edges which are line segments. A triangle with vertices A, B, and C is denoted .
- Triangle is a 2007 Hong Kong crime-thriller produced and directed by Tsui Hark, Ringo Lam, and Johnnie To. The film's title refers to both the acclaimed trio of filmmakers and to the uneasy brotherhood of the film's three protagonists. ...
- Triangle (2009) is a British-Australian psychological horror film, directed by Christopher Smith, and starring Melissa George, Rachael Carpani and Liam Hemsworth. The film was released in the UK on 16 October 2009.
- "Triangle" is the eleventh episode of season 5 of the television show Buffy the Vampire Slayer. Giles visits England, leaving Anya in charge of the Magic Box. Willow accidentally unleashes a troll, who used to be Anya's boyfriend. ...
- The Triangle (המשולש, HaMeshulash; المـُثـَلـَّث, al-Muthallath), formerly referred to as the Little triangle, is a concentration of Israeli Arab towns and villages adjacent to the Green Line, located in the eastern Sharon plain among the Samarian foothills; this area is located within the ...
- was a Japanese pop group that formed and debuted in the late 70s. They released their first single, Triangle Love Letter is mid 1978 and their last single, Koi wa Tekkiri Ba-Bi-Bu-Be-Bo in 1980. ...
- (Triangles) Sideways price patterns in which prices fluctuate with converging trendlines. The three types of triangles are symmetrical, ascending and descending triangles.
- (triangles) Objects in 3D scenes are composed of triangles. The triangles are defined as three XYZ vertex coordinates.
- (Triangles) A type of various drawing or drafting tool used by an artist to make a 90 degree-45 degree line. Each side is scaled with different measurements. Other tools may include compasses, T-squares, French curves, mechanical pencils and erasers.
- (Triangles) An image to suggest the internal and external oblique abs, which run on opposite diagonals across the front of your torso. Visualize two triangles: The first triangle uses the horizontal line between the hip bones as its base, with the point touching the navel. ...
- (Triangles) three players on the same team coming together in a way that promotes open, short-passing opportunities; the position of three players on the same team that looks like they are at the points of the three-sided geometric shape.
- (Triangling) process in which two family members lower the tension level between them by drawing in a third member.
- A group of three people who link up each day in thought for a few minutes of creative meditation.
- 3D term. This is a type of face. It is made up of three vertices.
- An arrangement of tracks using three turnouts and shaped somewhat as its name suggests that permits locomotives or complete trains to be turned. This formation requires special wiring for two rail models.
- To dream of a triangle, foretells separation from friends, and love affairs will terminate in disagreements.
- A pattern that exhibits a series of narrower price fluctuations over time; top and bottom boundaries need not be of equal length.
- An almost invariably horizontal charge whose apex lies along the meridian, and which may extend up to or slightly exceeding one-half the length of a flag, but whose base usually occupies the full width of the hoist. ...
- The small area behind the ears, in the shape of a triangle, which is generally lighter in color than the rest of the coat. A feature of Tan and Agouti Patterned animals.
- Heartland of Samaria, including the towns of Tulkarm, Kalkilya and Nablus.