Triangle
Triangle Tri"an`gle, n. [L. triangulum, fr. triangulus triangular; tri- (see {Tri-}) + angulus angle: cf. F. triangle. See {Angle} a corner.] 1. (Geom.) A figure bounded by three lines, and containing three angles. [1913 Webster]

Note: A triangle is either plane, spherical, or curvilinear, according as its sides are straight lines, or arcs of great circles of a sphere, or any curved lines whatever. A plane triangle is designated as scalene, isosceles, or equilateral, according as it has no two sides equal, two sides equal, or all sides equal; and also as right-angled, or oblique-angled, according as it has one right angle, or none; and oblique-angled triangle is either acute-angled, or obtuse-angled, according as all the angles are acute, or one of them obtuse. The terms scalene, isosceles, equilateral, right-angled, acute-angled, and obtuse-angled, are applied to spherical triangles in the same sense as to plane triangles. [1913 Webster]

2. (Mus.) An instrument of percussion, usually made of a rod of steel, bent into the form of a triangle, open at one angle, and sounded by being struck with a small metallic rod. [1913 Webster]

3. A draughtsman's square in the form of a right-angled triangle. [1913 Webster]

4. (Mus.) A kind of frame formed of three poles stuck in the ground and united at the top, to which soldiers were bound when undergoing corporal punishment, -- now disused. [1913 Webster]

5. (Astron.) (a) A small constellation situated between Aries and Andromeda. (b) A small constellation near the South Pole, containing three bright stars. [1913 Webster]

{Triangle spider} (Zo["o]l.), a small American spider ({Hyptiotes Americanus}) of the family {Ciniflonid[ae]}, living among the dead branches of evergreen trees. It constructs a triangular web, or net, usually composed of four radii crossed by a double elastic fiber. The spider holds the thread at the apex of the web and stretches it tight, but lets go and springs the net when an insect comes in contact with it. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • triangle — [ trijɑ̃gl ] n. m. • v. 1270; lat. triangulum 1 ♦ Figure géométrique, polygone plan à trois côtés. Les trois côtés, les trois sommets, les trois angles d un triangle. Triangle quelconque, scalène, isocèle, équilatéral. Triangle rectangle, qui a… …   Encyclopédie Universelle

  • Triangle — ist ein 429 m hoch gelegener Ort mit etwa 2.000 Einwohnern in der Provinz Masvingo in Simbabwe; gelegen an der Straße und Eisenbahnlinie Mbizi Chiredzi. Triangle liegt in einer heißen und trockenen Region. Um landwirtschaftlichen Anbau zu… …   Deutsch Wikipedia

  • triangle — m. triangle > Triangle isocèle : triangle isocèle …   Diccionari Personau e Evolutiu

  • Triangle — Triangle, VA U.S. Census Designated Place in Virginia Population (2000): 5500 Housing Units (2000): 2318 Land area (2000): 2.633489 sq. miles (6.820706 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.633489 sq …   StarDict's U.S. Gazetteer Places

  • triangle — late 14c., from O.Fr. triangle (13c.), from L. triangulum triangle, from neut. of adj. triangulus three cornered, from tri three (see TRI (Cf. tri )) + angulus corner, angle (see ANGLE (Cf. angle) (n.)). In the huts of w …   Etymology dictionary

  • triangle — ► NOUN 1) a plane figure with three straight sides and three angles. 2) something in the form of a triangle. 3) a musical instrument consisting of a steel rod bent into a triangle, sounded with a rod. 4) an emotional relationship involving a… …   English terms dictionary

  • Triangle — Episodio de Buffy the Vampire Slayer Título Triángulo Identificador 5ABB011 Episodio nº 11 Temporada 5 …   Wikipedia Español

  • triangle — Triangle. s. m. Figure qui a trois costes & trois angles. Triangle equilateral, qui a les costez égaux …   Dictionnaire de l'Académie française

  • triangle — [trī′aŋ΄gəl] n. [ME < MFr < L triangulum: see TRI & ANGLE1] 1. a geometric figure having three angles and three sides 2. any three sided or three cornered figure, area, object, part, etc. 3. a right angled, flat, triangular instrument used… …   English World dictionary

  • Triangle — This article is about the basic geometric shape. For other uses, see Triangle (disambiguation). Isosceles and Acute Triangle redirect here. For the trapezoid, see Isosceles trapezoid. For The Welcome to Paradox episode, see List of Welcome to… …   Wikipedia

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