triangle

See also: Triangle

English

A regular triangle, the geometric shape.

A triangle, the musical instrument.

Etymology

From Old French triangle, from Latin triangulum, noun use of adjective triangulus (“three-cornered, having three angles”), from trēs (“three”) + angulus (“corner, angle”).

Pronunciation

• IPA^(key): /ˈtɹaɪəŋɡəl/, /ˈtɹaɪˌæŋɡəl/
• enPR: trī'-ăng-gəl, IPA^(key): /ˈtɹaɪˌæŋɡəl/

• Audio (US):

  (file)

• Rhymes: -aɪæŋɡəl
• Hyphenation: tri‧an‧gle

Noun

triangle (plural triangles)

1. (geometry) A polygon with three sides and three angles.
2. (US, Canada) A set square.
3. (music) A percussion instrument made by forming a metal rod into a triangular shape which is open at one angle. It is suspended from a string and hit with a metal bar to make a resonant sound.
4. (cue sports) A triangular piece of equipment used for gathering the balls into the formation required by the game being played.
5. A love triangle.
   • 2009, Neil McDonald, Quadrant, November 2009, No. 461 (Volume LIII, Number 11), Quadrant Magazine Limited, page 104:

     One of the writers' most pleasing inventions was to treat the triangle love story as comedy.

6. (systemics) The structure of systems composed with three interrelated objects.
7. A draughtsman's square in the form of a right-angled triangle.
8. (historical) A frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment.
9. Any of various large papilionid butterflies of the genus .

   Synonym: bluebottle

10. (rail transport) A triangular formation of railway tracks, with a curve on at least one side.
    • 1961 March, ""Balmore"", “Driving and firing modern French steam locomotives”, in Trains Illustrated, page 147:

      After turning on the triangle at Jeumont, we set off light engine back to Aulnoye.

    Synonym: wye

Synonyms

• (polygon): threeside, trigon (rare)
• (love triangle): love triangle, menage à trois
• See also Thesaurus:triangle

Derived terms

• acute-angled triangle
• acute triangle
• anal triangle
• Bermuda Triangle
• black triangle
• circular triangle
• cyclic triangle
• Devil's Triangle
• equilateral triangle
• eternal triangle
• femoral triangle
• golden triangle
• Golden Triangle
• isosceles triangle
• love triangle
• North Atlantic Triangle
• obtuse-angled triangle
• obtuse triangle
• Pascal's triangle
• Polynesian Triangle
• pubic triangle
• Reuleaux triangle
• right-angled triangle
• right triangle
• scalene triangle
• set triangle
• Sierpinski triangle
• spherical triangle
• star-triangle relation
• Sunni Triangle
• triangle choke
• triangle inequality
• triangle offense
• triangle piercing
• triangle test
• triangle wave
• trianglist
• triangular
• triangular distribution
• triangular function
• triangular prism
• triangulate
• triangulation

 

Translations

polygon

• Afrikaans: driehoek
• Albanian: trekëndësh (sq) m
• Amharic: ሶስት ማእዘን (sost maʾzän)
• Arabic: مُثَلَّث m (muṯallaṯ)
• Aragonese: trianglo
• Armenian: եռանկյուն (hy) (eṙankyun)
• Assamese: ত্রিভুজ
• Asturian: triángulu m
• Aymara: mujina
• Azerbaijani: üçbucaq (az)
• Bashkir: өсмөйөш (ösmöyöş)
• Basque: hiruki
• Belarusian: трохку́тнік m (troxkútnik)
• Bengali: ত্রিভুজ (tribhuj)
• Bulgarian: триъ̀гълник (bg) m (triǎ̀gǎlnik)
• Burmese: တြိဂံ (my) (tri.gam)
• Catalan: triangle (ca) m
• Chinese:

  Mandarin: 三角 (zh) (sānjiǎo), 三角形 (zh) (sānjiǎoxíng)

• Corsican: triangulu
• Czech: trojúhelník (cs) m
• Danish: trekant (da) c
• Dutch: driehoek (nl)
• Esperanto: triangulo, trilatero
• Estonian: kolmnurk
• Faroese: tríhyrningur m
• Finnish: kolmio (fi)
• French: triangle (fr) m
• Galician: triángulo (gl) m
• Georgian: სამკუთხედი (samḳutxedi)
• German: Dreieck (de) n

  Rhine Franconian: ^{(please verify)} Draiegg (Palatine)

• Greek: τρίγωνο (el) n (trígono)

  Ancient: τρίγωνον n (trígōnon)

• Haitian Creole: triyang
• Hebrew: משולש \ מְשֻׁלָּשׁ (he) m (meshulásh)
• Hindi: त्रिकोण (hi) m (trikoṇ)
• Hungarian: háromszög (hu)
• Icelandic: þríhyrningur (is) m
• Ido: triangulo (io)
• Indonesian: segitiga (id)
• Irish: triantán (ga) m
• Italian: triangolo (it) m
• Japanese: 三角形 (ja) (さんかくけい, sankakukei)
• Javanese: segi telu
• Kalmyk: һурвлҗн (ğurvljn), һурвн булңт (ğurvn bulñt)
• Kashubian: trzënórt
• Kazakh: үшбұрыш (kk) (üşbūryş), үшкіл (üşkıl)
• Khmer: ត្រីកោណ (km) (trəy kaon)
• Korean: 삼각형 (ko) (samgakhyeong) (三角形 (ko))
• Kumyk: уьчмююшлюк (üçmüyüşlük), уьч буччакълыкъ (üç buççaqlıq)
• Kurdish:

  Sorani:

• Kyrgyz: үч бурчтук (üc burctuk)
• Lao: ສາມແຈ (sām chǣ)
• Latin: triangulum n
• Latvian: trīsstūris m
• Limburgish: driehook
• Lingala: mbata-isáto
• Lithuanian: trikampis m
• Lombard: triàngol
• (deprecated template usage) {{trans-mid}}
• Macedonian: триаголник m (triagolnik)
• Malay: segi tiga, segi telu
• Manx: troorane
• Maori: tapatoru
• Mongolian: гурвалжин (mn) (gurvalžin)
• Narom: trian
• Navajo: tááʼgóó yistłʼah, táaʼgo heetsʼóóz, táaʼgo deezʼá, tááʼgóó adeezʼá
• Northern Sami: golmmačiegat
• Norwegian:

  Bokmål: trekant (no) m

  Nynorsk: trekant m

• Occitan: triangle (oc)
• Pashto: درېڅنډی
• Persian: مثلث (fa) (mosalas), سه‌گوش (se-guš)
• Polish: trójkąt (pl) m inan
• Portuguese: triângulo (pt) m
• Quechua: kimsak'uchu
• Romanian: triunghi (ro) n
• Russian: треуго́льник (ru) m (treugólʹnik)
• Samogitian: trėkompis
• Scottish Gaelic: trì-cheàrnag f, trì-oinnsinneach m, trì-oisinneag f, triantan m
• Serbo-Croatian:

  Cyrillic: трокут m (Croatia)

  Roman: trokut (sh) m (Croatia)

• Shona: gonyonhatu
• Sicilian: triàngulu (scn) m
• Slovak: trojuholník (sk) m
• Slovene: trikotnik (sl) m
• Somali: saddax-xagal
• Sorbian:

  Lower Sorbian: tśirožk

• Spanish: triángulo (es) m
• Sundanese: juru tilu
• Swahili: pembetatu
• Swedish: triangel (sv) c, trekant (sv) c, trehörning (sv) c
• Tagalog: triyanggulo, tatsulok (tl), tilasitha
• Tajik: секунҷа (sekunja)
• Tatar: öçpoçmaq
• Telugu: త్రిభుజము (te) (tribhujamu), త్రికోణము (te) (trikōṇamu)
• Thai: สามเหลี่ยม (th) (sǎam-lìiam)
• Tibetan: གྲུ་གསུམ (gru gsum), ཟུར་གསུམ (zur gsum)
• Turkish: üçgen (tr), üçbucak
• Turkmen: üçburçluk
• Tuvan: үш-бүлүңчүк (üş-bülüñçük)
• Ukrainian: трику́тник (uk) m (trykútnyk)
• Urdu: مثلث (ur) m (musallas)
• Uyghur: ئۈچ بۇلۇڭ (üch bulung)
• Uzbek: uchburchak (uz)
• Venetian: triangoło
• Vietnamese: tam giác (vi), hình tam giác
• Volapük: killien (vo)
• Waray-Waray: trayanggulo
• Welsh: triongl (cy) m or f
• West Flemish: drieoek
• West Frisian: trijehoek c
• Yakut: үс муннук (üs munnuk)
• Yiddish: דרײַעק m (drayek)
• Yoruba: anígunmẹ́ta
• Zazaki: hirequnc, hirguş, hirdag
• Zulu: unxantathu class 1a/2a

percussion instrument

• Afrikaans: driehoek
• Asturian: triángulu m
• Catalan: triangle (ca) m
• Chinese:

  Mandarin: 三角鐵／三角铁 (zh) (sānjiǎotiě), 三角铁 (zh) (sānjiǎo tiě)

• Czech: triangl (cs) m
• Danish: triangel (da) c
• Dutch: triangel (nl) m
• Esperanto: triangulo
• Finnish: triangeli (fi)
• French: triangle (fr) m
• Galician: triángulo (gl) m, ferriños m pl
• German: Triangel (de) f
• Greek:

  Ancient:

  Modern: τρίγωνο (el) n (trígono)

• Hebrew: משולש (he) m (meshulásh)
• Hungarian: triangulum (hu)
• (deprecated template usage) {{trans-mid}}
• Icelandic: þríhorn n
• Irish: triantán (ga) m
• Italian: triangolo (it) m
• Japanese: トライアングル (ja) (toraianguru)
• Malay: kerincing
• Polish: trójkąt (pl) m inan
• Portuguese: triângulo (pt) m, ferrinhos m pl
• Romanian: trianglu (ro) n
• Russian: треуго́льник (ru) m (treugólʹnik)
• Serbo-Croatian:

  Cyrillic: трокут m (Croatia)

  Roman: trokut (sh) m (Croatia)

• Slovak: triangel
• Slovene: triangel (sl) m
• Spanish: triángulo (es) m
• Swedish: triangel (sv) c
• Tagalog: batingting
• Thai: สามเหลี่ยม (th) (sǎam-lìiam)
• Vietnamese: kẻng tam giác, kẻng ba góc
• Welsh: triongl (cy) m or f

love triangle — see love triangle

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

Translations to be checked

• Breton: ^{(please verify)} tric'horn (br) m, tric'hornioù pl (1)
• Indonesian: ^{(please verify)} segitiga (id)
• (deprecated template usage) {{trans-mid}}
• (deprecated template usage) Latin: triangulum n (1)

Further reading

• Triangle on Wikipedia.Wikipedia
• Triangle (disambiguation) on Wikipedia.Wikipedia
• Triangle (instrument) on Wikipedia.Wikipedia

Anagrams

• INTEGRAL, alerting, altering, integral, relating, tanglier, teraglin

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Catalan

Etymology

From Latin triangulum.

Pronunciation

• IPA^(key): (Central, Balearic) [tɾiˈaŋ.ɡlə]
• IPA^(key): (Valencia) [tɾiˈaŋ.ɡle]

Noun

triangle m (plural triangles)

1. (geometry) triangle
2. (music) triangle

Related terms

• triangular

Further reading

• “triangle” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
• “triangle”, in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana, 2024
• “triangle” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
• “triangle” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

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French

Etymology

Borrowed from Latin triangulum. Synchronically analysable as tri- +‎ angle.

Pronunciation

• IPA^(key): /tʁi.jɑ̃ɡl/

• audio:

  (file)

Noun

triangle m (plural triangles)

1. (geometry) triangle (polygon)

   triangle équilatéral

   equilateral triangle

   triangle isocèle

   isosceles triangle

2. (music) triangle (percussion instrument)

Derived terms

• triangulaire

Further reading

• “triangle”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

Anagrams

• intégral