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Triangle related to a given triangle by two functions
central triangle is a triangle in the plane of the reference triangle. The trilinear coordinates of its vertices relative to the reference triangle are
Central_triangle
Three-country region
The Northern Triangle of Central America (NTCA) is a term used in the United States to refer collectively to the three Central American countries of Guatemala
Northern Triangle of Central America
Northern_Triangle_of_Central_America
Fractal composed of triangles
Start with an equilateral triangle. Subdivide it into four smaller congruent equilateral triangles and remove the central triangle. Repeat step 2 with each
Sierpiński_triangle
List of points considered center of a triangle
Evansville. It started from a list of 400 triangle centers published in the 1998 book Triangle Centers and Central Triangles by Clark Kimberling. As of 10 February 2026[update]
Encyclopedia of Triangle Centers
Encyclopedia_of_Triangle_Centers
Point in a triangle that can be seen as its middle under some criteria
In geometry, a triangle center or triangle centre is a point in the triangle's plane that is in some sense in the middle of the triangle. For example,
Triangle_center
Urban legend based on a region in North Atlantic
The Bermuda Triangle, also known as the Devil's Triangle, is a loosely defined region in the North Atlantic Ocean, roughly bounded by Florida, Bermuda
Bermuda_Triangle
Triangle center
Yff central triangle of △ABC. The circumcircle of the Yff central triangle is called the Yff central circle of the triangle. Let △ABC be any triangle. Let
Yff_center_of_congruence
2009 film by Christopher Smith
Triangle is a 2009 psychological horror film written and directed by Christopher Smith and starring Melissa George, Michael Dorman, Rachael Carpani, Henry
Triangle_(2009_British_film)
Curved triangle with constant width
A Reuleaux triangle [ʁœlo] is a curved triangle with constant width, the simplest and best known curve of constant width other than the circle. It is formed
Reuleaux_triangle
1911 factory fire in New York City
The Triangle Shirtwaist Factory fire occurred in the Greenwich Village neighborhood of Manhattan, a borough of New York City, on Saturday, March 25, 1911
Triangle Shirtwaist Factory fire
Triangle_Shirtwaist_Factory_fire
Place in China
formerly romanized as Chungyuan), the Central Plain(s), also known as Zhongtu (Chinese: 中土; pinyin: Zhōngtǔ, lit. 'central land') and Zhongzhou (Chinese: 中州;
Zhongyuan
Triangular array of the binomial coefficients
Pascal's triangle becomes the binomial distribution in the symmetric case where p = 1 2 {\displaystyle p={\tfrac {1}{2}}} . By the central limit theorem
Pascal's_triangle
Arab-Israeli towns along the Green Line
Jaljulia Zemer The Triangle (Hebrew: המשולש, HaMeshulash; Arabic: المثلث, al-Muthallath), formerly referred to as the Little Triangle, is a concentration
Triangle_(Israel)
Megalopolis in East China
Development Council. Asian Times: "Growth cools in Yangtze River region" Golden Triangle extending to become a parallelogram? (in Chinese) (Translate to English:
Yangtze_Delta
Neighborhood in Allegheny County, Pennsylvania, United States
Downtown Pittsburgh, colloquially referred to as the Golden Triangle, and officially the Central Business District, is the urban downtown center of Pittsburgh
Downtown_Pittsburgh
3 intersections of any triangle's adjacent angle trisectors form an equilateral triangle
in any triangle, the three points of intersection of the adjacent angle trisectors form an equilateral triangle, called the first Morley triangle or simply
Morley's_trisector_theorem
Relation between sides of a right triangle
fundamental relation in Euclidean geometry between the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse (the
Pythagorean_theorem
Mathematical study of triangle properties (19th century–present)
mathematics, modern triangle geometry, or new triangle geometry, is the body of knowledge relating to the properties of a triangle discovered and developed
Modern_triangle_geometry
Ecoregion of Asia–Pacific
The Coral Triangle (CT) is a roughly triangular area in the tropical waters around Indonesia, Malaysia, Papua New Guinea, the Philippines, Solomon Islands
Coral_Triangle
current use) Six-pointed star – many equal stars Flag of Burundi – a central triangle of three stars Flag of Croatia – two stars on the coat of arms of Croatia
List of national flags by design
List_of_national_flags_by_design
Lionsgate media franchise
job with its action scenes while still keeping the focus on the central love triangle." Michael O'Sullivan of The Washington Post gave the film two and
The Twilight Saga (film series)
The_Twilight_Saga_(film_series)
Geometric construction of a smaller triangle
Hugo Steinhaus is that the (central) triangle with sides p,q,r be reflected in its sides and vertices. These six extra triangles partially cover ABC, and
One-seventh_area_triangle
Line constructed from a triangle
triangle that is not equilateral. It is a central line of the triangle, and it passes through several important points determined from the triangle,
Euler_line
Anatomical region in the face
The Bonwill Triangle is a triangle formed by the contact point of the mandibular central incisors and the right and left mandibular condyles. The distance
Bonwill_Triangle
Geographic region of North Carolina, U.S.
The Research Triangle, or simply The Triangle, are both common nicknames for a Combined Statistical Area in the Piedmont region of the U.S. state of North
Research_Triangle
Urban agglomeration in North China
foreign investments in manufacturing and health services. The Chinese central government has made it a priority to integrate all the cities in the Bohai
Jing-Jin-Ji
Species of moth
roseobrunnea ab. nov [Warren] from São Jorge Island in the Azores, has the central triangle rich red brown tinged with fulvous, the whole wing reddish tinged,
Angle_shades
Central business district in Indonesia
The Golden Triangle of Jakarta (Indonesian: Segitiga Emas Jakarta), also referred to as the Medan Merdeka–Thamrin–Sudirman Axis (Indonesian: Poros Medan
Golden_Triangle_of_Jakarta
Connected triangles that share a central vertex
that share one central vertex (unlike the triangle strip that connects the next vertex point to the last two used vertices to form a triangle), possibly within
Triangle_fan
area of a triangle is an elementary and widely encountered problem. The best known and simplest formula for the area of an arbitrary triangle is area =
Area_of_a_triangle
Central business district in Quezon City, Metro Manila, Philippines
Triangle Park, also known as the Quezon City Central Business District, is a 250 ha (620 acres) central business district in Quezon City, Philippines
Triangle_Park_(Quezon_City)
Topics referred to by the same term
up Golden Triangle or golden triangle in Wiktionary, the free dictionary. Golden Triangle or golden triangle may refer to: Golden Triangle (Southeast
Golden_Triangle
Small tiled plot of land in New York City
The Hess triangle is a triangular, 500-square-inch (3,200 cm2) plot of private land in the middle of a public sidewalk at the corner of Seventh Avenue
Hess_triangle
Circles tangent to all three sides of a triangle
incircle is a triangle center called the triangle's incenter. An excircle or escribed circle of the triangle is a circle lying outside the triangle, tangent
Incircle_and_excircles
Largest island of the Snares Island group, New Zealand
kilometres (120 mi) south of New Zealand's South Island. The island forms a central triangle with peninsulas to the north, south and west and is some 3 by 2.5 km
North East Island, New Zealand
North_East_Island,_New_Zealand
Geometric property of certain lines with respect to a given triangle
In geometry, central lines are certain special straight lines that lie in the plane of a triangle. The special property that distinguishes a straight line
Central_line_(geometry)
Symbol of anti-fascism
The red triangle, also known as the red wedge, was a required accessory worn by left-wing dissidents incarcerated in Nazi concentration camps during World
Red_triangle_(badge)
1976 British film
performance." John C. Mahoney of the Los Angeles Free Press saw the central triangle through the prism of Greek myth: "How much Oedipal vengeance is there
The Sailor Who Fell from Grace with the Sea (film)
The_Sailor_Who_Fell_from_Grace_with_the_Sea_(film)
central government, but in practice, provincial officials have considerable discretion over economic policy. Unlike in the United States, the central
Administrative divisions of China
Administrative_divisions_of_China
diagonally from the lower hoist-side corner, with a green upper triangle and red lower triangle. Adopted in 1983 to replace the flag of Saint Christopher-Nevis-Anguilla
Flag_of_Saint_Kitts_and_Nevis
Triangle whose side lengths and area are integers
Heronian triangle (or Heron triangle) is a triangle whose side lengths a, b, and c and area A are all positive integers. Heronian triangles are named
Heronian_triangle
Place
the West Triangle Economic Zone contributes nearly 40% of Western China's GDP. Furthermore, Chongqing is one of China's five National Central Cities, while
West_Triangle_Economic_Zone
2022 video game
Triangle Strategy is a 2022 tactical role-playing game co-developed by Square Enix and Artdink and published by Square Enix for the Nintendo Switch. Nintendo
Triangle_Strategy
Problem of finding unknown lengths and angles of a triangle
Solution of triangles (Latin: solutio triangulorum) is the main trigonometric problem of finding the characteristics of a triangle (angles and lengths
Solution_of_triangles
Equality of triangles between three squares
of a triangle to the area of each of the triangles formed by squares drawn along its sides. Let △ A B C {\displaystyle \triangle ABC} be a triangle in the
Cross's_theorem
Perpendicular line segment from a triangle's side to opposite vertex
In geometry, an altitude of a triangle is a line segment through a given vertex (called apex) and perpendicular to a line containing the side or edge opposite
Altitude_(triangle)
Subregion of the Asian continent
Central Asia is a region of Asia consisting of Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, and most of Kazakhstan. The countries as a group are
Central_Asia
State-level new area in Hebei, People's Republic of China
a development hub for the Beijing-Tianjin-Hebei (Jing-Jin-Ji) economic triangle. Additionally, nonessential functions of the Chinese capital are expected
Xiong'an
Point where the incircle and nine-point circle of a triangle are tangent
In the geometry of triangles, the incircle and nine-point circle of a non-equilateral triangle are internally tangent to each other at the Feuerbach point
Feuerbach_point
Triangle with circular arc edges
other in pairs; then the central triangular region surrounded by these circles is a horn triangle. However, other horn triangles, such as the arbelos (with
Circular_triangle
Property of geometry, also used to generalize the notion of "distance" in metric spaces
In mathematics, the triangle inequality states that for any triangle, the sum of the lengths of any two sides must be greater than or equal to the length
Triangle_inequality
Anatomical area located in the right atrium of human heart
Koch's triangle, also known as the triangle of Koch, is named after the German pathologist Walter Koch. Arthur Keith was possibly the first to describe
Koch's_triangle
Arab city in Israel
Hebrew: קלנסווה, lit. "turban") is an Arab city in the Central District of Israel. Part of the Triangle, in 2024 it had a population of 25,167. During the
Qalansawe
of the boundary of the dragon fractal "Fractal dimension of the Pascal triangle modulo k". Archived from the original on 15 October 2012. Retrieved 2 October
List of fractals by Hausdorff dimension
List_of_fractals_by_Hausdorff_dimension
Collection of buildings in Washington, D.C.
Federal Triangle is a triangular area in Washington, D.C., formed by 15th Street NW, Constitution Avenue NW, Pennsylvania Avenue NW, and E Street NW. Federal
Federal_Triangle
Kosher certification agency
the central rabbinic court of the central Chabad community in Crown Heights, which runs Crown Heights Kashrus released a statement deeming Triangle K as
Triangle_K
The trinomial triangle is a variation of Pascal's triangle. The difference between the two is that an entry in the trinomial triangle is the sum of the
Trinomial_triangle
Triangle derived from a given triangle and a coplanar point
geometry, a circumcevian triangle is a special triangle associated with a reference triangle and a point in the plane of the triangle. It is also associated
Circumcevian_triangle
Species of barnacle
98 in); the barnacles typically grow 1.3 centimetres (0.51 in) tall. The central triangle-shaped portions of these plates are called parietes – which in this
Tesseropora_rosea
Region south of Baghdad during the 2003–2011 occupation of Iraq
The Triangle of Death is a name given to a region south of Baghdad during the 2003–2011 occupation of Iraq by the U.S. and allied forces which saw major
Triangle_of_Death_(Iraq)
Economic region in southeastern China
urban area. Yangtze River Delta Economic Zone Bohai Economic Rim West Triangle Economic Zone Guangdong-Hong Kong-Macao Greater Bay Area "珠三角区域经济发展上升为国家战略-新闻频道-和讯网"
Pearl River Delta Economic Zone
Pearl_River_Delta_Economic_Zone
Trilemma in computer science concerning network naming schemes
Zooko's triangle is a trilemma of three properties that some people consider desirable for names of participants in a network protocol: Human-meaningful:
Zooko's_triangle
Triangle center associated with the nine-point circle
center is a triangle center, a point defined from a given triangle in a way that does not depend on the placement or scale of the triangle. It is so called
Nine-point_center
American tractor
improved flexible traction system, independent of each other, with a central triangle-shaped rocker using two tear-dropped runner blocks suspended by axles
Linn_tractor
Conic plane curve associated with a given triangle
In Euclidean geometry, a triangle conic is a conic in the plane of the reference triangle and associated with it in some way. For example, the circumcircle
Triangle_conic
Center of the inscribed circle of a triangle
the incenter of a triangle is a triangle center, a point defined for any triangle in a way that is independent of the triangle's placement or scale.
Incenter
center of mass of the system without changing its centrality. Placing three masses in an equilateral triangle, four at the vertices of a regular tetrahedron
Central_configuration
U.S. intelligence and covert action agency
The Central Intelligence Agency (CIA) /ˌsiː.aɪˈeɪ/ is a civilian foreign intelligence service of the federal government of the United States tasked with
Central_Intelligence_Agency
Array of partial sums of the binomial coefficients
Bernoulli's triangle is an array of partial sums of the binomial coefficients. For any non-negative integer n and for any integer k included between 0
Bernoulli's_triangle
Former country in Central America
The Federation of Central America (Spanish: Federación de Centro América) was a short-lived federal republic that existed in Central America between 1921
Federation of Central America (1921–1922)
Federation_of_Central_America_(1921–1922)
Region off the coast of northern California
The Red Triangle is the colloquial name of a roughly triangle-shaped region off the coast of northern California, extending from Bodega Bay, north of
Red_Triangle_(Pacific_Ocean)
Subway stations in South Korea
each doorway of each carriage are marked with 3 arrows or triangles. The central triangle indicates that disembarking passengers should leave from the
Seoul Metropolitan Subway stations
Seoul_Metropolitan_Subway_stations
First letter of the Latin alphabet
derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version is often
A
Rhubarb-producing area in England
The Rhubarb Triangle is a 9-square-mile (23 km2) area of West Yorkshire, England famous for producing early forced rhubarb. It is delineated by Wakefield
Rhubarb_Triangle
Cut of beef
Maria-style barbecue), "triangle tip", and "triangle steak". The cut was known in the United States as early as 1915, called "the triangle part" of the loin
Tri-tip
Subregion of North America
Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the
Central_America
Mean position of all the points in a shape
({\text{Area of }}\triangle ABG)=({\text{Area of }}\triangle ACG)=({\text{Area of }}\triangle BCG)={\tfrac {1}{3}}({\text{Area of }}\triangle ABC).} The isogonal
Centroid
Historical region in central Uganda associated with the Ugandan Bush War (1981–1986)
The Luweero Triangle, sometimes spelled Luwero Triangle, is an area of Uganda north of the capital Kampala, where, in 1981, Yoweri Museveni started the
Luwero_Triangle
Public transit service in North Carolina, USA
GoTriangle is the operator of regional public transit bus services in the Research Triangle region of North Carolina. GoTriangle is a member of the region-wide
GoTriangle
Public park in Manhattan, New York
Central Park is an urban park between the Upper West Side and Upper East Side neighborhoods of Manhattan in New York City, and the first landscaped park
Central_Park
Wine region in New Zealand
Church Road, Stonecroft, and Pask. Also known as the Ngatarawa Triangle, the Bridge Pa Triangle wine district is approximately 2,100 hectares (5,200 acres)
Hawke's_Bay_wine_region
Area of the face with blood supply that connects indirectly to the brain
The danger triangle of the face consists of the area from the corners of the mouth to the bridge of the nose, including the nose and maxilla. Due to the
Danger_triangle_of_the_face
1947 film by Otto Preminger
Fonda, and Dana Andrews in a story about a post-World War II romantic triangle. The screenplay by David Hertz was based upon a 1945 novel of the same
Daisy_Kenyon
Concept in geometry
infinite-order triangular tiling can be generated by a recursive process from a central triangle as shown here: Wikimedia Commons has media related to Infinite-order
Infinite-order triangular tiling
Infinite-order_triangular_tiling
Prefecture-level city in Shaanxi, People's Republic of China
Weinan (Chinese: 渭南; pinyin: Wèinán) is a prefecture-level city in east-central Shaanxi province, northwest China. The city lies on the lower section of
Weinan
Urban park in Makati, Philippines
121°1′25″E / 14.55639°N 121.02361°E / 14.55639; 121.02361 The Ayala Triangle Gardens is a 2-hectare (4.9-acre) landscaped urban park in Makati, Metro
Ayala_Triangle_Gardens
Three-player Chinese chess variant
counterclockwise around the board. A chariot or cannon that reaches a central triangle point when traveling along a file, may cross the river in either of
Game_of_the_Three_Kingdoms
a cerulean blue field charged with a golden triangle in front of a white-edged black isosceles triangle. Adopted in 1967 to replace the British Blue
Flag_of_Saint_Lucia
Medical school of the University of Glasgow, Scotland
other aspects of doctors’ behaviour and attitudes are explored. The central triangle of the medical school, covered by a glass roof and with its own café
University of Glasgow School of Medicine, Dentistry & Nursing
University_of_Glasgow_School_of_Medicine,_Dentistry_&_Nursing
Planned city in Wallonia, Belgium
15-minute city, with the Agora, Main square and train station in a tight central triangle reachable by foot within 15 to 20 minutes from the outermost districts
Louvain-la-Neuve
Transnational criminal gang
Street and rival gang MS-13: "These two gangs have turned the Central American northern triangle into the area with the highest homicide rate in the world"
18th_Street_gang
Biogeographic sea region
which also includes the larger Japanese islands. The Central Indo-Pacific includes the Coral Triangle region, which has the greatest diversity of tropical
Central_Indo-Pacific
Most populous city in the United States
Slocum caught fire in the East River, killing 1,021 people. In 1911, the Triangle Shirtwaist Factory fire, the city's worst industrial disaster, killed 146
New_York_City
Mexican state symbol
The left triangle represents a mountain crossed with a pick and shovel, which symbolizes mining and that has a green field. The central triangle, with a
Coat_of_arms_of_Sonora
Capital city of North Carolina, U.S.
University and is part of the Research Triangle, which includes Durham (home to Duke University and North Carolina Central University) and Chapel Hill (home
Raleigh,_North_Carolina
looks like a square tiling with half of the squares divided into central triangles. It can be called a semikis square tiling, as alternate squares with
Chamfered_square_tiling
Region of the body between the genitals and anus
(or central tendon of perineum) is a pyramidal fibromuscular mass in the middle line of the perineum at the junction between the urogenital triangle and
Perineum
Grant Gore Triangle Gravesend Park Gravesend Square Green Central Knoll Greenwood Playground Hancock Playground Harmony Park Harmony Triangle Harry Chapin
List of parks in New York City
List_of_parks_in_New_York_City
blue and crimson red, with a white, equilateral triangle at the hoist. In the center of the triangle is a golden-yellow sun with eight primary rays, to
Flag_of_the_Philippines
Texas Golden Triangle Greater Houston Texas Midwest/West-Central Texas (includes Abilene, San Angelo, Brownwood, Texas) Texas Urban Triangle (Houston to
List of regions of the United States
List_of_regions_of_the_United_States
CENTRAL TRIANGLE
CENTRAL TRIANGLE
Boy/Male
Hindu
Of variegated color
Surname or Lastname
English (chiefly central and northern), Scottish, and Irish
English (chiefly central and northern), Scottish, and Irish : variant of Hanley.
Surname or Lastname
English
English : variant of Cantrell.
Girl/Female
Hindu, Indian, Marathi, Tamil, Traditional
Central
Surname or Lastname
English (central western England)
English (central western England) : from the Middle English personal name Huwelet, Huwelot, Hughelot, a double diminutive of Hugh formed with the diminutive suffixes -el + -et and -ot. The surname is also established in Ireland.
Girl/Female
Arabic, Muslim
Protector; Central; Defendant
Surname or Lastname
English (central and northern)
English (central and northern) : nickname for a gentle or timid person, from Middle English, Old English hind ‘female deer’.English and Scottish : variant of Hine ‘servant’, with excrescent -d.
Girl/Female
Tamil
Central
Boy/Male
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Oriya, Sindhi, Telugu
Of Variegated Colour
Surname or Lastname
English (southeastern and central)
English (southeastern and central) : topographic name for someone who lived by some oak trees, from misdivision of Middle English atten okes ‘at the oaks’ (see Nock).
Girl/Female
Muslim
Protector, Defendant, Central
Girl/Female
Hindu, Indian, Kannada, Marathi, Sindhi, Tamil, Telugu
Central
Girl/Female
Assamese, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit
Central; Centre of Body; An Ancient King
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
Central; Lord Shiva
Girl/Female
Muslim
Limitless, Protector, Defendant, Central
Surname or Lastname
English (mainly central)
English (mainly central) : topographic name for someone who lived where holly trees grew, from Middle English holi(n)s, plural of holin, holi(e) (Old English hole(g)n).
Girl/Female
Muslim/Islamic
Protector defendant, central
Surname or Lastname
English (mainly central and southeastern England)
English (mainly central and southeastern England) : patronymic from a personal name (see Hawk 1), or a variant of Hawk 2.
Surname or Lastname
English (mainly central England)
English (mainly central England) : patronymic from a pet form of the personal name Thomas.
Girl/Female
Arabic, Australian, Muslim
Protector; Defendant; Central
CENTRAL TRIANGLE
CENTRAL TRIANGLE
Boy/Male
Hindu, Indian
Bearer of Aids
Girl/Female
African, Danish, German, Kenyan, Netherlands
Beautiful
Male
Greek
(Φθα) Greek form of Egyptian Ptah, PHTHA means "opener (of the mouth)."
Girl/Female
Tamil
Boy/Male
Indian
Success, Reconciliation, Divine help
Boy/Male
Hindu
Principle
Boy/Male
Hindu
Name of a Hindu God
Surname or Lastname
English
English : variant spelling of Dickerson.
Boy/Male
Muslim Arabic
Smiling.
Girl/Female
American, Australian, British, English
Meadow on a Ledge
CENTRAL TRIANGLE
CENTRAL TRIANGLE
CENTRAL TRIANGLE
CENTRAL TRIANGLE
CENTRAL TRIANGLE
a.
Of or pertaining to the chin; genian; as, the mental nerve; the mental region.
pl.
of Postmaster-general
pl.
of Centrum
a.
Between the neural arch and the centrum of a vertebra; as, the neurocentral suture.
n.
Alt. of Centrale
a.
Common to many, or the greatest number; widely spread; prevalent; extensive, though not universal; as, a general opinion; a general custom.
a.
Of or pertaining to a century; as, a centurial sermon.
adv.
Toward the ventral side; on the ventral side; ventrally; -- opposed to dorsad.
n.
The central, or one of the central, bones of the carpus or or tarsus. In the tarsus of man it is represented by the navicular.
v. t.
To place or fix in the center or on a central point.
a.
Placed in the center or middle; central.
a.
Alt. of Centrical
a.
Pertaining to, or situated near, central or deep parts; inner; -- opposed to ectal.
adv.
In a central manner or situation.
a.
Having a relation to all; common to the whole; as, Adam, our general sire.
v. i.
To be placed in a center; to be central.
a.
Of or pertaining to the mind; intellectual; as, mental faculties; mental operations, conditions, or exercise.
a.
Of, pertaining to, or situated near, the belly, or ventral side, of an animal or of one of its parts; hemal; abdominal; as, the ventral fin of a fish; the ventral root of a spinal nerve; -- opposed to dorsal.
a.
Usual; common, on most occasions; as, his general habit or method.