| Subject | English | German |
| tech. | acute angled triangle | spitzwinkliges Dreieck |
| gen. | acute triangle | spitzwinkliges Dreieck |
| brit. | advance warning triangle | Warndreieck |
| med. | anal triangle | Aftergegend (regio analis) |
| med. | anal triangle | Analdreieck (regio analis) |
| med. | anal triangle | Analregion (regio analis) |
| opt. | angle of a spherical triangle | Winkel eines sphärischen Dreiecks (the dihedral angle between the two great planes that form the angle) |
| transp., construct. | apex of the theoretical triangle | Spitze des theoretischen Dreiecks |
| tech. | area of triangle | Dreiecksfläche |
| life.sc. | astronomic triangle | astronomisches Dreieck |
| life.sc. | astronomical triangle | astronomisches Dreieck |
| astr. | astronomical triangle | nautisches Dreieck (PZS triangle) |
| phys. | astronomical triangle | Polardreieck |
| phys. | astronomical triangle | nautisches Dreieck |
| tech. | astronomical triangle | sphaerisch-astronomisches Grunddreieck |
| med. | auxometric triangle | auxometrisches Dreieck |
| med. | auxometric triangle | Gobessi Dreieck |
| gen. | Bermuda triangle | Bermudadreieck |
| med. | bladder triangle | Harnblasendreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | bladder triangle | Lieutaud-Dreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | bladder triangle | Blasendreieck (trigonum vesicae, trigonum vesicae urinariae) |
| social.sc. | blue triangle on orange ground | blaues Dreieck auf orangefarbenem Grund |
| transp. | brake triangle | Bremsdreieck |
| gen. | brake triangle | Bremsdreieck Eisenbahn |
| med. | Bryant’s triangle | Bryantsches Dreieck |
| gen. | Bryant's triangle | Bryant-Dreieck |
| med. | carotid triangle | Malgaigne-Fossa (trigonum caroticum) |
| med. | carotid triangle | Karotisdreieck (trigonum caroticum) |
| tech. | celestial triangle | sphaerisch-astronomisches Grunddreieck |
| life.sc. | chain of triangles | Dreieckskette |
| gen. | cheese triangle | Käseecke |
| tech. | circumscribed triangle | umbeschriebenes Dreieck |
| chem. | clay triangle | Drahtdreieck |
| chem. | clay triangle | Tondreieck |
| phys. | color triangle | Farbendreieck |
| earth.sc., el. | color triangle | Farbdreieck |
| earth.sc., el. | color triangle | Farbtafel |
| earth.sc. | colour triangle | Farbentafel |
| commun. | colour triangle | Farbendreieck (video encoding) |
| commun. | colour triangle | Farbdreieck (video encoding) |
| commun. | colour triangle | Farbdiagramm (video encoding) |
| tech. | colour triangle | Farbtafel |
| tech. | colour triangle | Farbdreieck |
| AI. | congruent triangle | kongruentes Dreieck |
| life.sc., coal. | connecting triangle | Anschlussdreieck |
| life.sc., coal. | connecting triangle on surface of shaft plumbing | Obendreieck |
| tech. | construct a triangle | eine Dreieck konstruieren |
| tech. | course triangle | Kursdreieck |
| met. | crucible triangle | Glühring |
| chem. | crucible triangle | Tiegeldreieck |
| med. | crural triangle | Fossa scarpae major (trigonum femorale) |
| med. | crural triangle | Schenkeldreieck (trigonum femorale) |
| med. | crural triangle | Trigonum femorale (trigonum femorale) |
| med. | crural triangle | Leistendreieck (trigonum femorale) |
| tech. | current triangle | Stromdreieck |
| med. | digastric triangle | Spatium submaxillare |
| med. | digastric triangle | Unterkieferdreieck (trigonum submandibulare) |
| phys. | direction-finder triangle | Peildreieck |
| phys. | direction-finding triangle | Peildreieck |
| opt. | divide into triangles | in Dreiecke teilen |
| med. | Einthoven triangle | Einthoven-Dreieck |
| earth.sc., mech.eng. | entry triangle | Eintrittsdreieck |
| gen. | equilateral triangle | gleichseitiges Dreieck |
| tech. | error triangle | Fehlerdreieck |
| gen. | eternal triangle | Dreiecksverhältnis |
| fin., scient. | expanding triangle | Spannungsmuster |
| coal. | explosion triangle | Explosionsdreieck |
| opt. | external angle of the oblique triangle | Außenwinkel des schiefwinkligen Dreiecks |
| gen. | famine triangle | Hungerdreieck |
| med. | femoral triangle | Trigonum femorale (trigonum femorale) |
| med. | femoral triangle | Fossa scarpae major (trigonum femorale) |
| med. | femoral triangle | Leistendreieck (trigonum femorale) |
| med. | femoral triangle | Schenkeldreieck (trigonum femorale) |
| gen. | fire triangle | Feuerdreieck |
| emerg.care | fire triangle | Feuertriangel |
| gen. | fire triangle | Branddreieck |
| tech. | firing triangle | Schussdreieck |
| tech. | flow triangle | Stromdreieck |
| earth.sc. | force triangle | Kraeftedreieck |
| sail. | fore triangle | Vorsegeldreieck |
| med. | fossa scarpae major Scarpa's triangle | Trigonum femorale (trigonum femorale) |
| med. | fossa scarpae major Scarpa's triangle | Leistendreieck (trigonum femorale) |
| med. | fossa scarpae major Scarpa's triangle | Fossa scarpae major (trigonum femorale) |
| med. | fossa scarpae major Scarpa's triangle | Schenkeldreieck (trigonum femorale) |
| tech. | future position triangle | Trefferdreieck |
| med. | Garland’s triangle | Garlandsches Dreieck |
| astr. | general triangle | ungleichseitiges Dreieck |
| tech. | geodesic triangle | geodätisches Dreieck |
| med. | Gombault-Philippe's triangle | Fasciculus triangularis |
| med. | Grocco’s triangle | Rauchfuß-Groccosches Dreieck |
| med. | Grocco's triangle | Groccosches Dreieck |
| med. | Grocco's triangle | Rauchfussches Dreieck |
| med. | Grocco’s triangle | Grocco-Rauchfußsches Dreieck |
| med. | hypoglossohyoid triangle | Pirogowsches Dreieck |
| el. | impedance triangle | Impedanzdreieck |
| el. | impedance triangle | Widerstandsdreieck |
| tech. | impedance triangle | Vektordiagramm von Schein-, Blind- u. Wirkwiderstand der komplexen Zeichenebene |
| med. | inferior carotid triangle | unteres Karotisdreieck |
| med. | inferior lumbar triangle | Petit-Dreieck (trigonum lumbale inferius) |
| med. | inferior lumbar triangle | unteres Lendendreieck (trigonum lumbale inferius) |
| med. | influenzal triangle | Grippedreieck |
| med. | infraclavicular triangle | Infraklavikulargrube (fossa infraclavicularis) |
| med. | infraclavicular triangle | Trigonum deltoideopectorale (trigonum clavipectorale, trigonum deltoideopectorale) |
| med. | infraclavicular triangle | Unterschlüsselbeingrube (fossa infraclavicularis) |
| med. | infraclavicular triangle | Mohrenheimsche Grube (trigonum clavipectorale, trigonum deltoideopectorale) |
| med. | infraclavicular triangle | Mohrenheim-Grube (fossa infraclavicularis) |
| med. | inguinal triangle | Trigonum femorale (trigonum femorale) |
| med. | inguinal triangle | Fossa scarpae major (trigonum femorale) |
| med. | inguinal triangle | Schenkeldreieck (trigonum femorale) |
| med. | inguinal triangle | Leistendreieck (trigonum femorale) |
| earth.sc., mech.eng. | inlet triangle | Eintrittsdreieck |
| opt. | inscribed triangle | eingeschriebenes Dreieck |
| opt. | internal angle of the oblique triangle | Innenwinkel des schiefwinkligen Dreiecks |
| opt. | isosceles right triangle | gleichschenkliges rechtwinkliges Dreieck |
| gen. | isosceles triangle | gleichschenkliges Dreieck |
| ed. | knowledge triangle | Wissensdreieck |
| med. | Lientaud triangle | Lieutaud-Dreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | Lientaud triangle | Harnblasendreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | Lientaud triangle | Blasendreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | Lieutaud's triangle | Trigonum vesicae (trigonum vesicae (Lieutaudi)) |
| med. | Lieutaud's triangle | Blasendreieck (trigonum vesicae (Lieutaudi)) |
| tech. | load triangle | Lastdreieck (Statik) |
| gen. | love triangle | Dreiecksverhältnis |
| gen. | love triangle | Dreiecksgeschichte |
| gen. | love triangle | Dreiecksbeziehung |
| med. | lumbar triangle | Petit-Dreieck (trigonum lumbale inferius) |
| med. | lumbar triangle | unteres Lendendreieck (trigonum lumbale inferius) |
| med. | lymphoid triangle | Schlundring |
| med. | lymphoid triangle | Rachenring |
| busin. | magic triangle | magisches Dreieck |
| med. | Malgaigne triangle | Malgaigne-Fossa (trigonum caroticum) |
| med. | Malgaigne triangle | Karotisdreieck (trigonum caroticum) |
| biol. | Maxwell triangle | Maxwell-Dreieck |
| transp., tech. | measuring triangle | Stoßlückenmesser |
| tech. | median of a triangle | Mediane eines Dreiecks |
| tech. | median of a triangle | Seitenhalbierende eines Dreiecks |
| med. | Mohrenheim triangle | Unterschlüsselbeingrube (fossa infraclavicularis) |
| med. | Mohrenheim triangle | Infraklavikulargrube (fossa infraclavicularis) |
| med. | Mohrenheim triangle | Mohrenheim-Grube (fossa infraclavicularis) |
| opt. | nautical triangle | nautisches Dreieck |
| tech. | navigation triangle | Navigationsdreieck |
| phys. | navigational triangle | nautisches Dreieck |
| phys. | navigational triangle | Polardreieck |
| tech. | navigational triangle | Navigationsdreieck |
| tech. | navigational triangle | sphaerisch-astronomisches Grunddreieck |
| med. | Nehb’s triangle | Nehbsches Dreieck |
| transp. | Nordic Triangle | Nordisches Dreieck |
| gen. | oblique triangle | schiefwinkliges Dreieck |
| gen. | oblique triangle | nicht rechtwinkliges Dreieck |
| gen. | obtuse triangle | stumpfwinkliges Dreieck |
| phys. | parallactic triangle | parallaktisches Dreieck |
| astr. | parallactic triangle | Polardreieck |
| phys. | Pascal's triangle | Pascalsches Dreieck |
| tech. | Pascals's triangle | Pascalsches Zahlendreieck |
| med. | Pawlik's triangle | Trigonum vaginale Pawlik |
| med. | Petit lumbar triangle | Petit-Dreieck (trigonum lumbale inferius) |
| med. | Petit lumbar triangle | unteres Lendendreieck (trigonum lumbale inferius) |
| med. | Petit triangle | Petit-Dreieck (trigonum lumbale inferius) |
| med. | Petit triangle | unteres Lendendreieck (trigonum lumbale inferius) |
| med. | Petit's triangle | Lendendreieck (trigonum lumbale (Petiti)) |
| med. | Philippe-Gombault triangle | Gombault-Philippe-Dreieck |
| med. | Philippe-Gombault triangle | Philippe-Gombault-Trigonum |
| med. | Pinaud's triangle | Pirogowsches Dreieck |
| gen. | pink triangle worn by homosexuals in Nazi concentration camps | Rosa Winkel |
| chem. | pipe clay triangle | Drahtdreieck |
| chem. | pipe clay triangle | Tondreieck |
| chem. | pipeclay triangle | Drahtdreieck |
| chem. | pipe-clay triangle | Tondreieck |
| tech. | pipeclay triangle | Tondreieck |
| med. | Pirogoff's triangle | Pirogowsches Dreieck |
| astr. | plane triangle | ebenes Dreieck |
| tech. | plane triangle | Dreieck |
| phys. | polar triangle | Polardreieck |
| tech. | polar triangle | Poldreieck |
| tech. | position triangle | Fehlerdreieck (Standortbestimmung) |
| med. | posterior triangle of neck | hinteres Halsdreieck (regio cervicalis lateralis, trigonum cervicale posterius) |
| phys. | Potier triangle | Potiersches Dreieck |
| phys. | Potier's triangle | Potiersches Dreieck |
| tech. | present position triangle | Messdreieck |
| life.sc. | primary triangle | Hauptdreieck |
| comp., MS | project triangle | magisches Dreieck (The interrelationship of time, money, and scope. If you adjust any one of these elements, the other two are affected. For example, if you adjust the project plan to shorten the schedule, you might increase costs and decrease scope) |
| tech. | quadrantal triangle | Quadrantdreieck |
| gen. | railway triangle | Gleisdreieck |
| opt. | range triangle | Meßdreieck |
| med. | Reil's triangle | Schleifendreieck (trigonum lemnisci) |
| life.sc. | resection by inverted triangles of error | Rückwärtseinschneiden mit fehlerzeigenden Dreiecken |
| railw. | reversing triangle | Gleisdreieck (makhno) |
| tech. | right triangle | rechtswinkliges Dreieck |
| amer. | right triangle | rechtwinkliges Dreieck |
| astr. | right-angled spherical triangle | rechtwinkliges sphärisches Dreieck |
| gen. | right-angled triangle | rechtwinkliges Dreieck |
| construct. | runoff triangle | Querentwässerungsprofil |
| scient. | scalene triangle | ungleichschenkliges Dreieck |
| gen. | scalene triangle | ungleichseitiges Dreieck |
| scient. | scalenous triangle | ungleichschenkliges Dreieck |
| med. | Scarpa's triangle | Fossa Scarpae major |
| med. | Scarpa's triangle | Trigonum femorale |
| med. | Scarpa's triangle | Leistendreieck |
| med. | Scarpa’s triangle | Scarpasches Dreieck |
| busin., IT | semiotic triangle | semiotisches Dreieck |
| gen. | Sherren's triangle | Sherren-Dreieck |
| astr. | side of the spherical triangle | Seite des sphärischen Dreiecks |
| tech. | sighting triangle aiming exercise | Dreieckschiessen |
| tech. | sighting triangle aiming exercise | Dreieckzielen |
| weap. | sighting-triangle aiming practice | Dreieckzielen |
| construct. | sliding triangle | Gleitkeil |
| astr. | spherical isosceles triangle | gleichseitiges sphärisches Dreieck |
| tech. | spherical triangle | sphaerisches Dreieck (survey) |
| gen. | spherical triangle | sphärisches Dreieck |
| phys. | spheroidal triangle | Sphäroiddreieck |
| med. | sternocostal triangle | Trigonum sternocostale diaphragmatis |
| med. | sternocostal triangle | Larreysche Spalte |
| opt. | subdivide into a series of triangles | in eine Reihe von Dreiecken unterteilen |
| med. | submandibular triangle | Spatium submaxillare |
| med. | submandibular triangle | Unterkieferdreieck (trigonum submandibulare) |
| med. | submaxillary triangle | Spatium submaxillare |
| med. | submaxillary triangle | Unterkieferdreieck (trigonum submandibulare) |
| med. | superior carotid triangle | oberes Karotisdreieck |
| med. | superior carotid triangle | Fossa carotica |
| med. | superior carotid triangle | Trigonum caroticum |
| med. | superior carotid triangle | Malgaignesche Grube |
| med. | superior carotid triangle | Malgaigne-Fossa (trigonum caroticum) |
| med. | superior carotid triangle | Karotisdreieck (trigonum caroticum) |
| fin., scient. | symmetrical triangle | symmetrisches Dreieck |
| med. | syndrome of multifidus triangle | Multifidus-Dreieck-Syndrom |
| tech. | terrestrial triangle | Koppeldreieck |
| tech. | terrestrial triangle | Projektion des sphaerisch-astronomischen Grunddreiecks auf der Erdoberflaeche |
| gen. | the Golden Triangle | das goldene Dreieck |
| phys. | triangle anomaly | Dreiecksanomalie |
| phys. | triangle axiom | Dreiecksungleichung |
| phys. | triangle axiom | Dreiecksaxiom |
| weap. | triangle bayonet | Dreikantbajonett |
| gen. | triangle bra | Triangel-BH |
| gen. | triangle butterfly | Triangel-Falterfisch Indischer Baronesse-Falterfisch Chaetodon triangulum |
| tech. | triangle commutations | Dreiecksberechnung |
| phys. | triangle connection | Dreieckschaltung |
| coal. | triangle cut | Kegeleinbruch |
| coal. | triangle cut | Dreieckseinbruch |
| phys. | triangle diagram | Dreiecksdiagramm |
| auto. | triangle drive | Dreieckstrieb (Benzinpumpe) |
| weap. | triangle exercise | Dreieckzielen |
| phys. | triangle formula | Dreiecksformel |
| reptil. | triangle keelback | Dreieck-Wassernatter (Sinonatrix trianguligera) |
| trav. | triangle mark | Dreieckmarkierung |
| construct. | triangle misclosure | Dreieckfehler |
| med. | triangle of election | Fossa carotica |
| med. | triangle of election | Malgaignesche Grube |
| med. | triangle of election | Trigonum caroticum |
| med. | triangle of election | oberes Karotisdreieck |
| tech. | triangle of error | Fehlerdreieck |
| meas.inst. | triangle of errors | Fehlerdreieck |
| tech. | triangle of force | Kraeftedreieck |
| phys. | triangle of forces | Kräftedreieck |
| construct. | triangle of forces | Krafteck |
| med. | triangle of necessity | unteres Karotisdreieck |
| med. | triangle of Philippe-Gombault | Gombault-Philippe-Dreieck |
| med. | triangle of Philippe-Gombault | Philippe-Gombault-Trigonum |
| phys. | triangle of position | nautisches Dreieck |
| med. | triangle of the fillet | Schleifendreieck (trigonum lemnisci) |
| tech. | triangle of velocities | Winddreieck |
| tech. | triangle of velocity | Geschwindigkeitsdreieck |
| handb. | triangle play | Dreieckspiel |
| phys. | triangle pulse | Dreieckimpuls |
| med.appl. | triangle-pulse characteristic | Dreieckimpulscharakteristik |
| med.appl. | triangle-pulse current | Dreieckimpulsstrom |
| auto. | triangle reflector | Dreieck-Rückstrahler |
| phys. | triangle relation | Dreiecksrelation |
| opt. | triangle side | Dreiecksseite |
| comp., MS | triangle strip | Dreieckskette (A sequence of triangles in which adjacent triangles share an edge. The first three vertices define the first triangle, and each subsequent vertex defines a new triangle using that point along with two vertices from the previous triangle in the sequence) |
| tech. | triangle symmetry | Dreiecksymmetrie |
| AI. | triangle table | Dreieckstabelle |
| AI. | triangle table | Dreieckstafel |
| el. | triangle waveform | dreieckiges Signal |
| tech. | triangle wing | Dreieckfluegel |
| textile | twist triangle - | Zwirndreieck |
| busin. | uneasy triangle | magisches Dreieck |
| mech. | unloading triangle | Entlastungsbogen |
| med. | urogenital triangle | Urogenitalregion (regio urogenitalis) |
| med. | vaginal triangle | Trigonum vaginale Pawlik |
| patents. | vehicle breakdown warning triangles | Warndreiecke für Fahrzeuge mit Panne |
| gen. | vehicle breakdown warning triangles | Warndreiecke für Fahrzeuge |
| earth.sc., mech.eng. | velocity triangle | Geschwindigkeitsdreieck |
| tech. | velocity triangle | Winddreieck |
| med. | vena cava triangle | Kavadreieck |
| opt. | vertex of a right-angled triangle | Scheitel eines rechtwinkligen Dreiecks |
| med. | vesical triangle | Lieutaud-Dreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | vesical triangle | Trigonum vesicae (trigonum vesicae (Lieutaudi)) |
| med. | vesical triangle | Harnblasendreieck (trigonum vesicae, trigonum vesicae urinariae) |
| med. | vesical triangle | Blasendreieck (trigonum vesicae, trigonum vesicae urinariae) |
| tech. | voltage triangle | Spannungsdreieck |
| emerg.care | warning triangle | Warndreieck |
| law, transp., polit. | warning triangle | Autobahndreibock |
| law, transp., polit. | warning triangle | Pannendreieck |
| gen. | warning triangle | Warndreieck |
| gen. | warning triangles | Warndreiecke |
| med. | Wernicke's triangle | Crus occipitale |
| med. | Wernicke's triangle | Pars occipitalis capsulae internae |
| med. | Wilde triangle | Lichtreflex |
| med. | Wilde triangle | Lichtkegel |
| med. | Wilde triangle | Politzer-Lichtreflex |
| med. | Wilde triangle | Trommelfellreflex |
| life.sc. | wind triangle | Winddreieck |
| met. | wire triangle | Drahtdreieck |
| construct. | wooden staircase with triangles nailed to strings | Holztreppe auf Winkelknaggen |
| build.struct. | wooden triangle nailed to stair string | Winkelknagge |