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UFOs with triangular shape and dark color
Black triangles are UFOs reported as having a triangular shape and dark color, typically observed at night, described as large, silent, hovering, moving
Black_triangle_(UFO)
Topics referred to by the same term
Black triangle may refer to: Black Triangle (region), across Germany, Poland and the Czech Republic, long characterized by extremely high levels of pollution
Black_triangle
Nazi concentration camp badge for "asocials"
The inverted black triangle (German: schwarzer Winkel) was an identification badge used in Nazi concentration camps to mark prisoners designated "asocial"
Black_triangle_(badge)
Border region between Germany, Poland, and Czechia
The Black Triangle (Czech: Černý trojúhelník, German: Schwarzes Dreieck, Polish: Czarny trójkąt, Lower Sorbian: Carny tsirozk, Upper Sorbian: Čorny trirózk)
Black_Triangle_(region)
Cloth emblems; part of the system of identification in Nazi camps
rights is a response to the camp identification patches. The black, blue, purple, and red triangles have also been reclaimed by various remembrance and anti-fascist
Nazi_concentration_camp_badge
Symbol for the LGBTQIA+ community
wearing a black triangle.) If a prisoner was in addition identified as Jewish, the triangle was superimposed over a second yellow triangle pointing the
Pink_triangle
Region of the Czech Republic
both in the Sokolov District. The region is also part of the so-called Black Triangle, an area of heavy industrialization and environmental damage on the
Karlovy_Vary_Region
Darkest color
pacifists. More recently the black triangle has been adopted as a symbol in lesbian culture and by disabled activists. Black shirts were also worn by the
Black
Pharmaceutical symbol used in the UK
A black triangle appearing after the trade name of a British medicine (or vaccine) indicates that the medication is new to the market, or that an existing
Black triangle (pharmacovigilance)
Black_triangle_(pharmacovigilance)
Independent publisher of radical political and theoretical works
political text by Swiss writer P. M., and works by writers including Bob Black, Richard Kostelanetz, Michael Muhammad Knight, Antonio Negri, Félix Guattari
Autonomedia
Pride flag
the AVEN triangle which was used in the past to represent asexuality. The original iteration of the AVEN triangle, made by David Jay, was a black-bordered
Asexual_flag
Discolouration of the eye typically associated with corpses
sclera of the eye dries out and becomes discoloured, forming a yellow to black triangle or band corresponding to the position of the eyelids. The phenomenon
Tache_Noire_De_La_Sclerotique
Small triangle-shaped gap which often occurs between the teeth, near the gums
Angularis nigra, Latin for 'black angle', also known as open gingival embrasures, and colloquially known as "black triangle", is the space or gap seen
Angularis_nigra
Government agents who supposedly intimidate UFO witnesses
In popular culture and UFO conspiracy theories, men in black (MIB) are allegedly government agents dressed in dark suits, who question, intimidate, harass
Men_in_black
Fractal composed of triangles
Sierpiński triangle, also called the Sierpiński gasket or Sierpiński sieve, is a fractal with the overall shape of an equilateral triangle, subdivided
Sierpiński_triangle
Shape with three sides
A triangle or trigon is a polygon consisting of three sides connected at three corners. It is one of the basic shapes in geometry and the simplest of polygons
Triangle
Romantic orientation on the aromantic spectrum
demiromantic pride flag parallels the demisexual flag in design. It features a black triangle on the hoist pointing toward three horizontal stripes: a thick white
Demiromanticism
Triangular array of the binomial coefficients
111121133114641151010511615201561172135352171 In mathematics, Pascal's triangle is an infinite triangular array of the binomial coefficients which play
Pascal's_triangle
American businessman (born 1944)
notably ufology. The organization researched cattle mutilation and black triangle reports, ultimately attributing the latter to secretive advanced aircraft
Robert_Bigelow
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
Trade among three ports or regions
Triangular trade or triangle trade is trade between three ports or regions. Triangular trade usually evolves when a region has export commodities that
Triangular_trade
Czech–French photographer (born 1938)
He then produced Black Triangle, documenting the wasted landscape in the Podkrušnohoří region, the western tip of the Black Triangle's foothills of the
Josef_Koudelka
hoist side (and follow the flag's diagonals). The "Y" embraces a black isosceles triangle from which the arms are separated by narrow gold bands; the red
Flag_of_South_Africa
Sexual attraction to more than one gender
overlapping pink and blue triangles, forming lavender where they intersect. This design is an expansion on the pink triangle, a well-known symbol for the
Bisexuality
Emblem of comic book superhero
inverted triangle with an S inside of it. The shield first became a diamond in the Fleischer Studios animated serial Superman. It was black with a red
Superman_logo
Badge used in Nazi concentration camps to identify Jehovah's Witnesses
purple triangle superimposed on a yellow triangle. Nazi concentration camp badges Black triangle (badge) Brown triangle P (Nazi symbol) Pink triangle Red
Purple_triangle
choke Submental triangle Carotid triangle Clavipectoral triangle Inguinal triangle Codman triangle Black triangle Triangle (musical instrument) Triangular
List_of_triangle_topics
Symbol
concentration camp badges. Black triangle (disambiguation) Red star (disambiguation) White Terror (disambiguation) Brown triangle – used to mark victims of
Red_triangle
Symbol for the LGBTQ community
wore an inverted black triangle badge to identify them. Some lesbians reclaimed this symbol as gay men reclaimed the pink triangle (many lesbians also
Pride_flag
Triangle with vertices at midpoints of another triangle's sides
geometry, the medial triangle or midpoint triangle of a triangle △ABC is the triangle with vertices at the midpoints of the triangle's sides AB, AC, and
Medial_triangle
The national flag of the Commonwealth of The Bahamas consists of a black triangle situated at the hoist with three horizontal bands: aquamarine, gold and
Flag_of_the_Bahamas
people on a race basis and it also took on a status that excluded the Black triangle groups (the disabled, sex and gender minorities, alcoholics, homeless
Volksgenosse
Symbol of anti-fascism
The red triangle, also known as the red wedge, was a required badge worn by left-wing dissidents incarcerated in Nazi concentration camps during World
Red_triangle_(badge)
British political journalist
right-wing political figure in the UK in 2023. In October 2024, the Black Triangle Campaign, a disability organisation, referred Oakshott to Ofcom after
Isabel_Oakeshott
Symbols for lesbian community
consists of a labrys (a double-headed axe) superimposed on an inverted black triangle, set against a violet background. It was designed in 1999 by graphic
Lesbian_flags
Canadian Pacific Railway logo
circle and black triangle. Hopper car: Black, with a white circle and red triangle. Newsprint boxcars: Green, with a white circle and black triangle. Controlled
Multimark
Triangle containing a 90-degree angle
A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular
Right_triangle
Shape with three equal sides
triangle is a triangle with three sides of equal length and three equal angles. It is a regular polygon, occasionally known as the regular triangle.
Equilateral_triangle
Mostly heterosexual orientation with some homosexual attraction
Ambrose, Emily (2009). "Heteroflexibility: Bending the Existing Label Triangle". Colorado State University Journal of Student Affairs (43): 69–75. Ciumas
Heteroflexibility
Aircraft window seat with best wing view
travel writers for the passenger window seats next to the small black or red triangle markers fixed to the interior wall of an aircraft cabin. The markers
William_Shatner_seat
Mathematical symbols (+ and −)
BELOW U+2A27 ⨧ PLUS SIGN WITH SUBSCRIPT TWO U+2A28 ⨨ PLUS SIGN WITH BLACK TRIANGLE U+2A29 ⨩ MINUS SIGN WITH COMMA ABOVE U+2A2A ⨪ MINUS SIGN WITH DOT BELOW
Plus_and_minus_signs
Topics referred to by the same term
Black hearts may refer to: Black Hearts: One Platoon's Descent into Madness in Iraq's Triangle of Death Fly Black Hearts Black Hearts in Battersea Black
Black_hearts
Positive stance toward LGBTQ people
pride flags, the lowercase Greek letter lambda (λ), the pink triangle and the black triangle, these latter two reclaimed from use as badges of shame in
Pride_(LGBTQ_culture)
Supposed celestial phenomenon in the Holy Roman Empire
an aerial battle "out of the sun", followed by the appearance of a large black triangular object and exhausted combatant spheres falling to earth in clouds
1561 celestial phenomenon over Nuremberg
1561_celestial_phenomenon_over_Nuremberg
Character in Alex Haley's ''Roots''
2017. Thomas, Griselda (2014). "The Influence of Malcolm X and Islam on Black Identity". Muslims and American Popular Culture. ABC-CLIO. pp. 48–49. ISBN 9780313379635
Kunta_Kinte
Area of Lake Michigan known for disappearances and maritime disasters
The Lake Michigan Triangle is, according to modern legends, an area of Lake Michigan where a number of disappearances, shipwrecks, and plane crashes have
Lake_Michigan_Triangle
the black isosceles triangle based on the hoist-side bearing a white five-pointed star in the center superimposed on the larger yellow triangle, also
Flag_of_Timor-Leste
Graphical user interface feature by Apple
black triangle (Mac OS X 10.0-10.4) a blue-tinted luminous dot (Mac OS X 10.5-10.7), a horizontal light bar (OS X 10.8 and 10.9), and a simple black or
Dock_(macOS)
2022 film by Ruben Östlund
Triangle of Sadness is a 2022 satirical black comedy film written and directed by Ruben Östlund in his English-language feature debut. The film stars
Triangle_of_Sadness
Community and culture of lesbian, gay, bisexual and transgender people
were labeled with pink triangles to distinguish between them, Jews, regular prisoners, and political prisoners. The black triangle is similarly a symbol
LGBTQ_community
LGBTQ awareness and celebration day
Western countries. Participants often wear pride symbols such as pink triangles and rainbow flags.[citation needed] National Coming Out Day is also observed
National_Coming_Out_Day
Jamaican-born photographer and publisher (born 1945)
He published a book also entitled The Black Triangle the following year, and Children of the Black Triangle was produced four years later. He was a
Armet_Francis
Belgian UFO investigation group
phenomena") was a UFO investigation group, famed for its investigation of the black triangle incidents in Belgium, known as the Belgian Wave, in 1989 and 1990. The
SOBEPS
Independent anomaly research organization
phenomena and performed research in the areas of cattle mutilation and black triangle reports. The organization bought Skinwalker Ranch after journalist George
National Institute for Discovery Science
National_Institute_for_Discovery_Science
South African actress (1990–2022)
(2010–2013), the superhero drama series Black Lightning (2018) and the Palme d'Or-winning dark comedy Triangle of Sadness (2022). Dean was born on 5 February
Charlbi_Dean
Region of the Czech Republic
production industries among others. The region is part of the so-called Black Triangle, an area of heavy industrialization and environmental damage on the
Liberec_Region
1997 light phenomenon over Arizona, US
2017 Star people, a science-fiction drama released in 2025. Black project Black triangle (UFO) Hessdalen lights Marfa lights Tinley Park Lights List of
Phoenix_Lights
black, white, and green bands, with a red isoceles triangle based at the hoist. The colors are the pan-Arab colors, representing the Abbasid (black band)
Flag_of_Jordan
Genocide of the Romani in Europe during World War II
Retrieved 21 June 2026. Lewy 2000, p. 36. "Third Reich" (PDF). "Questions: Triangles". The Holocaust History Project. 16 May 2000. Archived from the original
Romani_Holocaust
Logic puzzle
rectangular grid of white and black squares. Some black cells may contain a number. The objective of the puzzle is to place triangles in some of the white cells
Shakashaka
Arrangement of colors within a triangle
chromaticity diagram are inverted, a triangle with real primary colors cyan, magenta, and yellow at its corners, and black at its center, can be outlined within
Color_triangle
Part of the gingiva between teeth
between adjacent teeth. Dentists will sometimes refer to this gap as a 'black triangle'. It can sometimes be corrected with orthodontic treatment. The relationship
Interdental_papilla
triangle, along with white, green and black stripes, and this flag was endorsed by the Palestinian Liberation Organization in 1964. The red triangle on
Red triangle (Palestinian symbol)
Red_triangle_(Palestinian_symbol)
V-shaped valleys between adjacent teeth
form spillway spaces which are known as embrasures. Angularis nigra ("black triangle") "TheFreeDictionary". 2014 Farlex, Inc. Retrieved 13 April 2014. Nelson
Embrasure_(dentistry)
Topics referred to by the same term
Big black delta may refer to: Big Black Delta, an American rock band Big Black Delta (album), a 2013 album by the band Black triangle (UFO), another name
Big_black_delta
A-Spec sexuality with low levels of sexual attraction that fluctuates over time
represent intermediate sexuality The demisexual flag, in which the black triangle represents asexuality, gray represents gray asexuality and demisexuality
Gray_asexuality
Act of an enslaver freeing the persons they enslaved
free black people to the total number of black people rose from less than 1% to 10% in the Upper South. In Virginia, the proportion of free black people
Manumission
Social justice construct
Colombian Black Pacific (Afro-Latin America), Cambridge: Cambridge University Press. doi:10.1017/9781108935890 Beckles, Hilary. Britain's Black Debt: Reparations
Reparations_for_slavery
Unidentified phenomenon at Hessdalen valley in Norway
A group of students, engineers, and journalists collaborated as "The Triangle Project" in 1997–1998 and recorded the lights in a pyramid shape that bounced
Hessdalen_lights
1685 law on slavery in the French colonial empire
The Code noir (French pronunciation: [kɔd nwaʁ], Black code) was a decree passed by King Louis XIV of France in 1685, defining the conditions of slavery
Code_noir
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
Species of bird
grams. The males are distinguished from the females by exhibiting a black triangle on their throat . They are closely related to the lyrebird, having only
Noisy_scrubbird
Armoured division of the British Army
the insignia became the "pattern of three" — a black triangle trisected by an inverted red triangle. The division was part of the Allied British and
3rd_(UK)_Division
Romani subgroup
Sinti were forced to wear either a black triangle, indicating their classification as "asocial", or a brown triangle, specifically reserved for Sinti,
Sinti
Species of fly
with a black triangle. Scutellum red.The face lacks a black median band.The anterior mesonotum is largely black, the posterior red without black. For terms
Loxocera_albiseta
Japanese strategy board game
historically uses white triangle (△) to indicate Gote's move and black triangle (▲) to notate Sente's move. Therefore, in Shogi, Black moves first, not White
Shogi
Painting by Joan Miró
represents Miró's actual cat, who was always next to him as he painted. The black triangle in the window in the top right corner represents the Eiffel Tower. The
The_Harlequin's_Carnival
Region of the Czech Republic
with well-developed tourism. The region is part of the so-called Black Triangle, an area of heavily industrialization and environmental damage on the
Hradec_Králové_Region
Species of snake
brown or black blotches. The head is white or cream with a fine, dark central line, black spots on the rear corners, and a dark blue-black triangle behind
Gaboon_viper
1989–1990 sightings of triangular UFOs
created the hoax UFO, by cutting a piece of styrofoam into a triangle, painting it black, embedding a flashlight in each corner, and hanging it from a
Belgian_UFO_wave
Idea advanced by Ufologists
understand lifting a square and placing it upon a square or a triangle upon a triangle. But you do not know anything of about placing a cube upon a cube
Interdimensional UFO hypothesis
Interdimensional_UFO_hypothesis
Name given to an enslaved person
result, some organizations, including Muhammad's Nation of Islam and the black nationalist US Organization encourage African Americans to abandon their
Slave_name
2005 American TV series or program
sightings (Kenneth Arnold sighting, Phoenix Lights, Illinois police "black triangle" sighting incident): features CSICOP scientific consultant James McGaha
UFOs:_Seeing_Is_Believing
Alleged alien abduction in 1961
a recollection of observing the humanoid forms wearing glossy black uniforms and black caps. Red lights on what appeared to be bat-wing fins began to
Barney and Betty Hill incident
Barney_and_Betty_Hill_incident
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
Color between indigo and ultraviolet on the electromagnetic spectrum
designer Sean Campbell, features a labrys superimposed on the inverted black triangle set against a violet background. Media related to Purple flags at Wikimedia
Violet_(color)
1978 disappearance of a pilot over Bass Strait, Australia
who disappeared in similar circumstances Australian ufology Bass Strait Triangle List of people who disappeared mysteriously: post-1970 Westall UFO Nickell
Disappearance of Frederick Valentich
Disappearance_of_Frederick_Valentich
1993 studio album by Above the Law
Black Mafia Life is the second studio album by American hip hop group Above the Law. It was released on February 2, 1993, via Ruthless Records. This album
Black_Mafia_Life
Flags and symbols used by the LGBTQ community
with a black triangle symbolizing supposed "asociality", this symbol was later reclaimed by postwar lesbians. The downward-pointing pink triangle was used
LGBTQ_symbols
Title character of Uncle Tom's Cabin
non-resistance for the white man, under all possible outrage and peril, as for the black man ... [For whites in parallel circumstances, it is often said] Talk not
Uncle_Tom
Region of the Czech Republic
Ore Mountains from Ústí nad Labem to Kadaň. The region is part of the Black Triangle, an area of heavily industrialization and environmental damage on the
Ústí_nad_Labem_Region
Haitian revolutionary and first ruler (1758–1806)
the slave trade. He granted them full citizenship and classified them as black. Tensions remained with the minority mixed-race population, who had gained
Jean-Jacques_Dessalines
Prisoners' camp identification numbers, cloth emblems, and armbands
wears a two-color double-triangle ID-emblem. Disabled Jews with double-triangle cloth badges: a black triangle on a yellow triangle, meaning "asocial Jews"
Identification of inmates in Nazi concentration camps
Identification_of_inmates_in_Nazi_concentration_camps
British government study of UFOs (1997–2000)
produce an unexplained energy field which creates the appearance of a Black Triangle by refracting light. The electromagnetic fields generated by plasma
Project_Condign
American author and journalist
In 2010, he wrote the best-selling book Black Hearts: One Platoon's Descent into Madness in Iraq's Triangle of Death, about the Mahmudiyah killings.
Jim_Frederick
Pharmacovigilance system in the United Kingdom
monitoring (highlighted in the British National Formulary with a ▼ black triangle), however minor Those, however minor, which occurred in a child (under
Yellow_Card_Scheme
Historical division of United States by legality of slavery
contrast to the status of most Black people, either free or enslaved, in the colonies. Despite this, thousands of Black Americans fought for the Patriot
Slave_states_and_free_states
List of alleged UFO sightings within the United Kingdom
Baron Gilbert, the former MP for Dudley East 26 September 1993: a large black triangle is seen over Bakewell in the Derbyshire Dales at 21:30.[citation needed]
UFO sightings in the United Kingdom
UFO_sightings_in_the_United_Kingdom
inverted black triangle. In the United States during the 1990s, some lesbians used the black triangle symbol as an identifier; the pink triangle was also
History_of_lesbianism
Anne Peters. 2003. Kissing Kate. By Lauren Myracle. 2003. The Bermudez Triangle. By Maureen Johnson. 2004. A Great and Terrible Beauty. By Libba Bray.
List_of_lesbian_fiction
travel, tourism, insurance
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travel, tourism, insurance