TRIANGLE • DICCIONARIO INGLES.COM • Definition of Triangle

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/trˈaɪˌæŋgəl/ Listen

noun

Triangle n.

1.

(Geom.) A figure bounded by three lines, and containing three angles. 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.

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.

3.

A draughtsman's square in the form of a right-angled triangle.

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.

5.

(Astron.)

(a)

A small constellation situated between Aries and Andromeda.

(b)

A small constellation near the South Pole, containing three bright stars.

Triangle spider (Zool.), a small American spider (Hyptiotes Americanus) of the family Ciniflonidae, 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.

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Etymology of 'Triangle'

Collaborative International Dictionary of English 0.48

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"Triangle" Quotes from Famous Books

... as has been said, at the end of a long crescent of continuous houses. The little garden that shut it in ran out into a sharp point like a green cape pushed out into the sea of two streets. Smith and his cab shot up one side of the triangle, and certainly most of those standing inside of it never expected to see him again. At the apex, however, he turned the horse sharply round and drove with equal violence up the other side of the garden, visible to all those in the group. With a common impulse the little crowd ran across the lawn ...

— Manalive • G. K. Chesterton

... choice, and are devoid of truth. Here! stern duty calls. Do you hold one end of the tape at the foot of the chimney, and I'll measure off the base line of our triangle." ...

— The Galaxy - Vol. 23, No. 1 • Various

... prided herself on her preparations. She had placed a newspaper inside the grand piano over the strings, and when the hammers struck against it the effect of the accompaniment was exactly that of a banjo. She had borrowed two sets of castanets, a pair of cymbals, and a triangle, and with these loud-sounding instruments she and her companions emphasized the chorus. Garnet and Winona helped with mandoline and guitar, so the general result was quite orchestral. During the performance of this chef-d'oeuvre some of the prefects went round with collecting ...

— The Luckiest Girl in the School • Angela Brazil

... His understanding in relation to our intellect—that is, the will and the understanding of God are in reality one and the same, and are only distinguished in relation to our thoughts which we form concerning God's understanding. For instance, if we are only looking to the fact that the nature of a triangle is from eternity contained in the Divine nature as an eternal verity, we say that God possesses the idea of a triangle, or that He understands the nature of a triangle; but if afterwards we look to the ...

— The Philosophy of Spinoza • Baruch de Spinoza

... could be found; the legs, which were of a vast length, were covered with thick, strong scales, plainly indicating the animal to be formed for living amidst deserts; and the foot differed from an ostrich's by forming a triangle, instead of ...

— A Narrative of the Expedition to Botany Bay • Watkin Tench

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