A triangle is a geometric shape with three sides.

Triangle may also refer to:

Mathematics

  • Exact triangle, a collection of objects in category theory
  • Triangle inequality, Euclid's proposition that the sum of any two sides of a triangle is longer than the third side
  • American expression for set square, an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline
  • The triangle graph in graph theory

Entertainment

Music

  • Triangle (musical instrument), in the percussion family
  • Tri Angle (record label), in New York and London
  • Triangle (band) a Japanese pop group in 1970s
  • The Triangles, Australian band

Albums

  • Tri-Angle, a 2004 album by TVXQ
  • Triangle (The Beau Brummels album), 1967
  • Triangle (Perfume album), 2009
  • Triangle (Diaura album), 2014
  • Triangle, a 2008 album by Mi Lu Bing
  • Triangle, a 2011 EP by 10,000 Maniacs

Film

  • Triangle Film Corporation, a film studio in the U.S. during the silent era
  • The Triangle (film), a 2001 made-for-TV thriller
  • Triangle (2007 film), a Hong Kong crime-thriller
  • Triangle (2009 British film), a British-Australian psychological thriller
  • Triangle (2009 South Korean film), a South Korean-Japanese comedy
  • The Triangle, a 1953 film starring Douglas Fairbanks Jr.

Television

  • The Triangle (miniseries), a 2005 Sci-Fi Channel series
  • Triangle (1981 TV series), a 1980s BBC soap opera
  • Triangle (2014 TV series), a 2014 MBC Korean drama
  • "Triangle" (Buffy the Vampire Slayer), 2001
  • "Triangle" (The X-Files), 1998
  • "The Triangle" (The Amazing World of Gumball), 2015
  • "The Triangle" (The Golden Girls), 1985
  • "Triangles", an episode of Private Practice

Games

  • Slapball, a baseball street variant
  • Triangle offense, an offensive strategy used in basketball

Places

  • Bermuda Triangle, area of the North Atlantic between Bermuda, Florida, and Puerto Rico
  • Le Triangle, a residential district in Montreal
  • Triangle, Newfoundland and Labrador, Canada
  • Triangle (Israel), a concentration of Israeli Arab towns
  • Triangle Region (Denmark) (Trekanten), a sub-region on the Jutland Peninsula
  • Trianglen, Copenhagen, a large intersection in Copenhagen, Denmark
  • Research Triangle, a region of North Carolina, U.S., anchored by Raleigh, Durham, and Chapel Hill
  • Triangle, New York, United States
  • Triangle, Virginia, United States
  • Triangle, West Yorkshire, a village in Calderdale, England
  • Triangle, Zimbabwe

Other uses

  • Triangle (chart pattern), in financial technical analysis
  • Triangle (novel), a 1983 Star Trek novel
  • Triangle (Paris building)
  • Triangle (railway), an English term equivalent to a North American Wye rail
  • Triangle Pose, a yoga āsana
  • Triangle Fraternity, social fraternity for STEM Students
  • Triangle Rewards, a loyalty program offered by Canadian Tire
  • The Triangle (newspaper), at Drexel University
  • The Triangle, Manchester, a building in England
  • Triangles (novel), a 2011 novel by Ellen Hopkins
  • Trigonodes hyppasia or Triangles, a species of moth
  • Weimar Triangle, a regional alliance of France, Germany, and Poland
  • Delta (letter), in the Greek alphabet, whose uppercase (Δ) resembles a triangle
  • Bansiot (ㅿ), in the Korean alphabet Hangul, which resembles a triangle

See also

  • Triangle Lake (disambiguation)
  • Triangle Park (disambiguation)
  • Triangeln station, a railway station in Malmö, Sweden
  • Triangular trade
  • Triangular election in France
  • Triangulum (disambiguation)