Definition of triangle

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

Lern More About Triangle

Area :: Area (n.) The superficial contents of any figure; the surface included within any given lines; superficial extent; as, the area of a square or a triangle..
Amblygon :: Amblygon (n.) An obtuse-angled figure, esp. and obtuse-angled triangle..
Wing :: Wing (n.) That part of the hold or orlop of a vessel which is nearest the sides. In a fleet, one of the extremities when the ships are drawn up in line, or when forming the two sides of a triangle..
Isosceles :: Isosceles (a.) Having two legs or sides that are equal; -- said of a triangle.
Trigon :: Trigon (n.) A kind of game at ball played by three persons standing at the angular points of a triangle.
Altitude :: Altitude (n.) The perpendicular distance from the base of a figure to the summit, or to the side parallel to the base; as, the altitude of a triangle, pyramid, parallelogram, frustum, etc..
Cepheus :: Cepheus (n.) A northern constellation near the pole. Its head, which is in the Milky Way, is marked by a triangle formed by three stars of the fourth magnitude. See Cassiopeia..
Cone :: Cone (n.) A solid of the form described by the revolution of a right-angled triangle about one of the sides adjacent to the right angle; -- called also a right cone. More generally, any solid having a vertical point and bounded by a surface which is described by a straight line always passing through that vertical point; a solid having a circle for its base and tapering to a point or vertex..
Hypothenuse :: Hypothenuse (n.) The side of a right-angled triangle that is opposite to the right angle.
Self-conjugate :: Self-conjugate (a.) Having the two things that are conjugate parts of the same figure; as, self-conjugate triangles..
Scalene :: Scalene (a.) Having the sides and angles unequal; -- said of a triangle.
Pentacle :: Pentacle (n.) A figure composed of two equilateral triangles intersecting so as to form a six-pointed star, -- used in early ornamental art, and also with superstitious import by the astrologers and mystics of the Middle Ages..
Triangle :: Triangle (n.) A small constellation situated between Aries and Andromeda.
Scalenohedron :: Scalenohedron (n.) A pyramidal form under the rhombohedral system, inclosed by twelve faces, each a scalene triangle..
Triangular :: Triangular (a.) Having three angles; having the form of a triangle.
Right-angled :: Right-angled (a.) Containing a right angle or right angles; as, a right-angled triangle..
Three-square :: Three-square (a.) Having a cross section in the form of an equilateral triangle; -- said especially of a kind of file.
Tetrahedron :: Tetrahedron (n.) A solid figure inclosed or bounded by four triangles.
Octahedron :: Octahedron (n.) A solid bounded by eight faces. The regular octahedron is contained by eight equal equilateral triangles.
Side :: Side (n.) The margin, edge, verge, or border of a surface; especially (when the thing spoken of is somewhat oblong in shape), one of the longer edges as distinguished from the shorter edges, called ends; a bounding line of a geometrical figure; as, the side of a field, of a square or triangle, of a river, of a road, etc..
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