# triangle
## English
### Etymology

* PIE word
* *tréyes
From Middle English triangle, from Old French triangle, from Latin triangulum, noun use of adjective triangulus (“three-cornered, having three angles”), from trēs (“three”) + angulus (“corner, angle”), equivalent to tri- +‎ angle.

### Pronunciation

* (UK) IPA: /ˈtɹaɪəŋɡəl/, /ˈtɹaɪˌæŋɡəl/
* (US) enPR: trī'-ăng-gəl, IPA: /ˈtɹaɪˌæŋɡəl/
* Audio (US):(file)
* Rhymes: -aɪæŋɡəl
* Hyphenation: tri‧an‧gle
* Rhymes: -æŋɡəl

### Noun

triangle (plural triangles)
* (geometry) A polygon with three sides and three angles.
** 1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 22:The wedge-shaped character was the triangle, the archaic Paleolithic sign of the vulva; the pubic triangle was at the end of the phallic stylus.
* (US, Canada) A set square.
* (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.
* (cue sports) A triangular piece of equipment used for gathering the balls into the formation required by the game being played.
* 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.
* (systemics) The structure of systems composed with three interrelated objects.
* A draughtsman's square in the form of a right-angled triangle.
* (historical, usually in the plural) A frame formed of three poles stuck in the ground and united at the top, to which people were bound for corporal punishment.
** 1851, Henry Mayhew, London Labour and the London Poor, published 1861:I was flogged in 1840. To this day I feel a pain in the chest from the triangles.
** 1868, “The Week”, in The Nation‎, volume 6, number 149:But nothing is said as to what we are to do with the negro when we have cut him off from absolute dominion; we are not informed if we may spread him on the triangles as aforetime;
* Any of various large papilionid butterflies of the genus Graphium.
    Synonym: bluebottle
* (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
* See also △ (symbol)

#### Derived terms

* acute-angled triangle
* acute triangle
* anal triangle
* anterior triangle
* anti-triangle
* Bermuda Triangle
* black triangle
* Brocard triangle
* Calot's triangle
* Cape triangle
* carotid triangle
* circular triangle
* color triangle
* colour triangle
* combustion triangle
* cyclic triangle
* cystohepatic triangle
* Devil's Triangle
* devil's triangle
* equilateral triangle
* eternal triangle
* femoral triangle
* fire triangle
* Floyd's triangle
* Gergonne triangle
* Golden Triangle
* golden triangle
* Goualougo Triangle
* Harberger's triangle
* Harberger triangle
* hepatobiliary triangle
* hepatocystic triangle
* ideal triangle
* iron triangle
* isosceles triangle
* Kanizsa triangle
* Karpman drama triangle
* Koch's triangle
* Lenné Triangle
* love triangle
* Morley triangle
* North Atlantic Triangle
* obtuse-angled triangle
* obtuse triangle
* Pascal's triangle
* Penrose triangle
* pink triangle
* Polynesian Triangle
* posterior triangle
* pubic triangle
* purple triangle
* Pythagorean triangle
* red triangle slug
* Reuleaux triangle
* right-angled triangle
* right triangle
* scalene triangle
* Scarpa's triangle
* set triangle
* Sierpinski triangle
* sight triangle
* South Triangle
* spherical triangle
* star-triangle relation
* sternocostal triangle
* Sunni Triangle
* superior carotid triangle
* tangential triangle
* triangle choke
* triangle-free
* triangle group
* triangle inequality
* triangle offense
* triangle of life
* triangle piercing
* triangle pose
* triangle spider
* triangle test
* triangle wave
* trianglist
* triangular
* triangular distribution
* triangular function
* triangular prism
* triangulate
* triangulation
* unified rear triangle
* van Arkel–Ketelaar triangle
* warning triangle
* West Triangle
* work triangle

#### Translations

Afrikaans: driehoek (af)
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 (bn) (tribhuj), ত্রিকোণ (bn) (trikōn), তেকোনা (bn) (tekōna)
Bulgarian: триъ́гълник (bg) m (triǎ́gǎlnik)
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) m
Egyptian: (spdt f)
Esperanto: triangulo, trilatero
Estonian: kolmnurk (et)
Faroese: tríhyrningur m
Finnish: kolmio (fi)
French: triangle (fr) m
Friulian: triangul m
Galician: triángulo (gl) m
Georgian: სამკუთხედი (samḳutxedi)
German: Dreieck (de) n
Rhine Franconian: Draiegg (Palatine)
Greek: τρίγωνο (el) n (trígono)
Ancient: τρίγωνον n (trígōnon)
Gujarati: ત્રિકોણ (trikoṇ)
Haitian Creole: triyang
Hebrew: משולש \ מְשֻׁלָּשׁ (he) m (meshulásh)
Hindi: त्रिकोण (hi) m (trikoṇ), त्रिभुज (hi) m (tribhuj)
Hungarian: háromszög (hu)
Icelandic: þríhyrningur (is) m
Ido: triangulo (io)
Indonesian: segitiga (id)
Ingrian: kolminurkkain
Irish: triantán (ga) m
Italian: triangolo (it) m
Japanese: 三角 (ja) (さんかく, sankaku), 三角形 (ja) (さんかくけい, sankakukei)
Javanese: segi telu
Kalmyk: һурвлҗн (ğurvljn), һурвн булңт (ğurvn bulñt)
Kannada: ತ್ರಿಕೋನ (kn) (trikōna)
Kashubian: trzënórt m
Kazakh: үшбұрыш (kk) (üşbūryş), үшкіл (üşkıl), үштаған (üştağan)
Khmer: ត្រីកោណ (km) (trəykaon)
Korean: 삼각(三角) (ko) (samgak), 삼각형(三角形) (ko) (samgakhyeong), 세모 (ko) (semo)
Kumyk: уьчмююшлюк (üçmüyuşlük), уьч буччакълыкъ (üç buççaqlıq)
Kurdish:
Central Kurdish: سێگۆشە (sêgoşe)
Northern Kurdish: sêgoşe (ku)
Kyrgyz: үч бурчтук (üc burctuk), үчбурч (ücburc)
Ladin: please add this translation if you can
Lao: ສາມແຈ (sām chǣ), ສາມຫຼ່ຽມ (sām līam)
Latin: triangulum n
Latvian: trīsstūris m
Ligurian: triàngolo m
Limburgish: driehook (li)
Lingala: mbata-isáto
Lithuanian: trikampis m
Lombard: triàngol
Low German:
East Frisian: dreikâant (nds) m
Macedonian: триа́голник m (triágolnik)
Malay: segi tiga (ms), segi telu
Manx: troorane
Maori: tapatoru
Mongolian:
Cyrillic: гурвалжин (mn) (gurvalžin)
Moore: kog-tãabga
Navajo: tááʼgóó yistłʼah, táaʼgo heetsʼóóz, táaʼgo deezʼá, tááʼgóó adeezʼá
Norman: trian
Northern Sami: golmmačiegat
North Frisian:
Föhr-Amrum: triihuk (frr) m
Northern Goesharde: (Ockholm) träikånt (frr) n, (Langenhorn) träikaant (frr) n
Sylt: Triihuk (frr) m, Triikant (frr) m
Wiedingharde: träikant (frr) n
Norwegian:
Bokmål: trekant (no) m
Nynorsk: trekant m
Occitan: triangle (oc)
Oromo: rog-sadee
Pashto: درې څنډى m (dre cᶕnḍay), مثلث m (mosalas), تکون m (tekun)
Persian: مثلث (fa) (mosalas), سه‌گوش (se-guš), سه‌گوشه (se-guše)
Piedmontese: triàngol m
Polish: trójkąt (pl) m inan
Portuguese: triângulo (pt) m
Quechua: kimsak'uchu
Rohingya: please add this translation if you can
Romagnol: please add this translation if you can
Romanian: triunghi (ro) n
Russian: треуго́льник (ru) m (treugólʹnik)
Samogitian: trėkompis
Sanskrit: त्रिकोण (sa) m (trikoṇa)
Sardinian: triàngulu (sc) m
Saterland Frisian: Trjokaant (stq) n
Scottish Gaelic: trì-cheàrnag f, trì-oinnsinneach m, trì-oisinneag f, triantan m
Serbo-Croatian:
Cyrillic: тро̏кӯт m (Croatia), троугао m
Roman: trȍkūt (sh) m (Croatia), trougao m
Shona: gonyonhatu
Sicilian: triàngulu (scn) m
Slovak: trojuholník (sk) m
Slovene: trikotnik (sl) m
Somali: saddax-xagal
Sorbian:
Lower Sorbian: tśirožk m
Southern Altai: ӱчтолук (üčtoluk)
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), сегӯша (següša), мусаллас (musallas) (literary)
Tamil: முக்கோணம் (ta) (mukkōṇam)
Tatar: өчпочмак (tt) (öçpoçmaq)
Tày: slam cooc
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, müselles (tr) (obsolete)
Turkmen: üçburçluk
Tuvan: үш-бүлүңчүк (üş-bülüñçük)
Ukrainian: трику́тник (uk) m (trykútnyk)
Urdu: مُثَلَّث (ur) m (musallas)
Uyghur: ئۈچ بۇلۇڭ (üch bulung)
Uzbek: uchburchak (uz), musallas (uz) (dated)
Venetan: triangoło
Vietnamese: tam giác (vi), hình tam giác (vi)
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 :
    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

#### Further reading

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

### Anagrams

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

## Catalan
### Etymology

Borrowed from Latin triangulum.

### Pronunciation

* IPA: (Central, Balearic) [tɾiˈaŋ.ɡlə]
* IPA: (Valencia) [tɾiˈaŋ.ɡle]
* Audio:(file)

### Noun

triangle m (plural triangles)
* (geometry) triangle
* (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, 2025
* “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.

## French
### Etymology

Borrowed from Latin triangulum. By surface analysis, tri- +‎ angle.

### Pronunciation

* IPA: /tʁi.jɑ̃ɡl/
* Audio:(file)

### Noun

triangle m (plural triangles)
* (geometry) triangle (polygon)
    triangle équilatéral ― equilateral triangle
    triangle isocèle ― isosceles triangle
* (music) triangle (percussion instrument)

#### Derived terms

* triangle amoureux
* triangle de sécurité
* triangulaire

### Further reading

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

### Anagrams

* intégral