TRIANGLES
Noun
triangles
plural of triangle
A largely tropical, old-world, erebid moth, Trigonodes hyppasia, with triangular markings on the wings.
Anagrams
• Glanister, Lastinger, alterings, gnarliest, integrals, relatings, resalting, reslating, teraglins
Source: Wiktionary
TRIANGLE
Tri"an`gle, n. Etym: [L. triangulum, fr. triangulus triangular; tri-
(see Tri-) + angulus angle: cf. F. triangle. See Angle a corner.]
1. (Geom.)
Definition: 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.)
Definition: 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.)
Definition: 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 (Zoöl.), a small American spider
(Hyptiotes Americanus) of the family Ciniflonidæ, 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.
Source: Webster’s Unabridged Dictionary 1913 Edition