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Shape with ten sides
In geometry, a decagon (from the Greek δέκα déka and γωνία gonía, "ten angles") is a ten-sided polygon or 10-gon. The total sum of the interior angles
Decagon
American technology company
Decagon AI, Inc. is an American artificial intelligence company that develops conversational AI agents for customer service. The company is headquartered
Decagon_(company)
1987 novel by Yukito Ayatsuji
The Decagon House Murders (Japanese: 十角館の殺人, Hepburn: Jukkakukan no Satsujin) is a 1987 Japanese mystery novel, the debut work of author Yukito Ayatsuji
The_Decagon_House_Murders
METER Group, Inc., formerly Decagon Devices, is an American corporation that designs and markets scientific instruments, sensors, and data loggers for
METER_Group
Japanese manga series
The Decagon House Murders (Japanese: 十角館の殺人, Hepburn: Jukkakukan no Satsujin) is a Japanese manga series, based on Yukito Ayatsuji's novel of the same
The Decagon House Murders (manga)
The_Decagon_House_Murders_(manga)
Relates the 4 sides and 2 diagonals of a quadrilateral with vertices on a common circle
AF is drawn bisecting DC so that DF and CF are sides c of an inscribed decagon, Ptolemy's Theorem can again be applied – this time to cyclic quadrilateral
Ptolemy's_theorem
Church in Cologne
(between 350 and 365) have been preserved. This, the lower part of today's decagon, is one of the most important examples of ancient representative architecture
St. Gereon's Basilica, Cologne
St._Gereon's_Basilica,_Cologne
Four-dimensional analog of the icosahedron
decagons: 6 fiber bundles of 12 great decagons. The 12 Clifford parallel decagons in each bundle are completely disjoint. Adjacent parallel decagons are
600-cell
25th Johnson solid (37 faces)
one regular decagon as its faces. To construct, begin by attaching the pentagonal rotunda's base to one of the pentagonal antiprism's decagons. This construction
Gyroelongated pentagonal rotunda
Gyroelongated_pentagonal_rotunda
2024 Japanese television series
The Decagon House Murders (Japanese: 十角館の殺人, Hepburn: Jūkakukan no satsujin) is a 2024 Japanese mystery series based on the novel of the same name written
The Decagon House Murders (TV series)
The_Decagon_House_Murders_(TV_series)
Natural number
ten points important in Pythagoreanism. A ten sided polygon is called a decagon. Mathematics portal Weisstein, Eric W. "Happy Number". mathworld.wolfram
10
Polygon with 20 edges
icosagon has Schläfli symbol {20}, and can also be constructed as a truncated decagon, t{10}, or a twice-truncated pentagon, tt{5}. One interior angle in a regular
Icosagon
6th Johnson solid (17 faces)
comprise ten equilateral triangles, six regular pentagons, and one regular decagon, making a total of seventeen. The pentagonal rotunda is an example of Johnson
Pentagonal_rotunda
Japanese writer (born 1960)
known for her fantasy series The Twelve Kingdoms. His first novel The Decagon House Murders was ranked as the No. 8 novel on the Top 100 Japanese Mystery
Yukito_Ayatsuji
Cupola with decagonal base
pentagon, and 1 decagon. The pentagonal cupola's faces are five equilateral triangles, five squares, one regular pentagon, and one regular decagon. It has the
Pentagonal_cupola
Polygonal chain whose vertices are not all coplanar
Regular zig-zag skew polygons Skew square Skew hexagon Skew octagon Skew decagon Skew dodecagon {4}#{ } {6}#{ } {8}#{ } {10}#{ } {5}#{ } {5/2}#{ } {12}#{
Skew_polygon
Character.ai Cognition AI Colloquis Conversable CoreWeave Counsel AI Covariant Decagon EleutherAI ElevenLabs Figure AI Glean Technologies Google AI Groq Hebbia
List of artificial intelligence companies
List_of_artificial_intelligence_companies
10-pointed star polygon
polygon. There is one regular decagram, containing the vertices of a regular decagon, but connected by every third point. Its Schläfli symbol is {10/3}. The
Decagram_(geometry)
Polyhedron with a pentagonal cupola and ten-sided prism
prism's two decagons, so that the resulting polyhedron has five equilateral triangles, fifteen squares, one regular pentagon, and one regular decagon. Because
Elongated_pentagonal_cupola
Archimedean solid with 32 faces
icosidodecahedron, and the two-dimensional decagon. (The icosidodecahedron is the equatorial cross-section of the 600-cell, and the decagon is the equatorial cross-section
Icosidodecahedron
Number, approximately 1.618
(c. 850–930) employed it in his geometric calculations of pentagons and decagons; his writings influenced that of Fibonacci (Leonardo of Pisa) (c. 1170–1250)
Golden_ratio
Common ideogram in modern culture
A five-pointed star (☆), geometrically an equilateral concave decagon, is a common ideogram in modern culture. Comparatively rare in classical heraldry
Five-pointed_star
Type of isosceles triangle
of regular pentagrams. Golden triangles can also be found in a regular decagon, an equiangular and equilateral ten-sided polygon, by connecting any two
Golden_triangle_(mathematics)
Aspect of topological graph theory
polygon of the dodecahedron is a skew decagon. Seen from the solid's 5-fold symmetry axis it looks like a regular decagon. Every pair of consecutive sides
Petrie_dual
31st Johnson solid (22 faces)
cupolas is the sum of the dihedral angle between square-to-decagon and triangle-to-decagon, 69.09°. Berman, Martin (1971). "Regular-faced convex polyhedra"
Pentagonal_gyrobicupola
Rectangle with side lengths in the golden ratio
rectangle using three polygons circumscribed by congruent circles: a regular decagon, hexagon, and pentagon. The respective lengths a, b, and c of the sides
Golden_rectangle
Removing parts of a polytope without creating new vertices
Pentagon Hexagon Decagon Pentagram {5/2} Star hexagon Compound 2{3} Decagram {10/3} Compound 2{5} Compound 2{5/2} Star decagon
Faceting
Non-periodic tiling of the plane
Mundi, that these gaps can be filled using pentagrams (star polygons), decagons and related shapes. Kepler extended this tiling by five polygons and found
Penrose_tiling
Right triangle with a feature making calculations on the triangle easier
{5}}}{2}}={\frac {1}{\varphi }}\approx 0.618} be the side length of a regular decagon inscribed in the unit circle, where φ {\displaystyle \varphi } is the golden
Special_right_triangle
Japanese actor (born 1980)
(2022), Kiso Yoshinaka Futari no Ultraman (2022), Hajime Tsuburaya The Decagon House Murders (2024), Shimada Kiyoshi Like a Dragon: Yakuza (2024), Goro
Munetaka_Aoki
Solid with 12 equal pentagonal faces
where the vertices of a decagon are connected to those of two pentagons, one pentagon connected to odd vertices of the decagon and the other pentagon connected
Regular_dodecahedron
Egyptian mathematician of Abbasid era (c. 850 – 930)
Abū Kāmil Shujāʿ ibn Aslam ibn Muḥammad Ibn Shujāʿ (Latinized as Auoquamel, Arabic: أبو كامل شجاع بن أسلم بن محمد بن شجاع, also known as Al-ḥāsib al-miṣrī—lit
Abu_Kamil
Productivity web application
assign work to and track agents including Claude Code, Cursor, Codex, and Decagon directly within their workspace. The company reported that users had built
Notion (productivity software)
Notion_(productivity_software)
Form of an object
prefix with '-gon' suffix: Pentagon, Hexagon, Heptagon, Octagon, Nonagon, Decagon... See polygon In geometry, two subsets of a Euclidean space have the same
Shape
Prefix derived from numerals or other numbers
g. octahedron e.g. November e.g. December e.g. decathlon, decahedron, decagon e.g. duodenum e.g. dodecahedron e.g. triskaidekaphobia e.g. tetradecahedron/
Numeral_prefix
Currency of Iraq
and sizes remained the same with the exception of the 1 fil which was decagon shaped. This image was then replaced by three palms in 1968. In 1970, 250
Iraqi_dinar
Brazilian mixed martial artist (born 1995)
Win 7–0 Cleverson Silva TKO (spinning back kick to the body) Fighten Decagon MMA 3 September 11, 2016 1 3:10 Londrina, Brazil Return to Bantamweight
Daniel_Santos_(fighter)
Heptagon/Septagon – 7 sides Octagon – 8 sides Nonagon/Enneagon – 9 sides Decagon – 10 sides Hendecagon – 11 sides Dodecagon – 12 sides Tridecagon – 13 sides
List of two-dimensional geometric shapes
List_of_two-dimensional_geometric_shapes
Natural number
Kevin Jardine's projects. Kevin Jardine. Retrieved 7 March 2022. "Pentagon-Decagon Packing". American Mathematical Society. AMS. Retrieved 7 March 2022. Sloane
17_(number)
Polygon with equally angled vertices
decagons, ⟨10⟩, ⟨10/2⟩, ⟨10/3⟩, ⟨10/4⟩, have 144°, 108°, 72° and 36° internal angles respectively. 144° internal angles from an equiangular decagon ⟨10⟩
Equiangular_polygon
Kepler–Poinsot polyhedron
them. The 24 faces are 12 pentagons from the truncated vertices and 12 decagons taking the form of doubly-wound pentagons overlapping the first 12 pentagons
Small_stellated_dodecahedron
Square Cross-polytope Hypercube Pentagon Hexagon Heptagon Octagon Enneagon Decagon Hendecagon Dodecagon Tridecagon Tetradecagon Pentadecagon Hexadecagon Heptadecagon
List_of_mathematical_shapes
Plane figure bounded by line segments
dodecagon. The triangle, quadrilateral and nonagon are exceptions. Beyond decagons (10-sided) and dodecagons (12-sided), mathematicians generally use numerical
Polygon
Polyhedron with 20 rhombic faces
each of these 10 rhombi has 2 of its 4 sides lying on this zig-zag skew decagon equator. The rhombic icosahedron has 22 vertices. It has D5d, [2+,10],
Rhombic_icosahedron
Natural number
vertices. The diagonals of a regular decagon meet at 171 points, including both crossings and the vertices of the decagon. There are 171 faces and edges in
171_(number)
Natural number
decagonal number which applies the properties of triangular numbers to decagons. 297 is a Kaprekar number which means that it can be rewritten as the singular
297_(number)
Japanese television personality, telesvion presenter, and actress
the original on June 4, 2023. Retrieved June 4, 2023. "Live-Action The Decagon House Murders Series Reveals Cast in New Trailer". Anime News Network.
Neru_Nagahama
City in Golestan Province, Iran
Maghsoodloo Magtymguly Pyragy Shahpour Turkian Mohsen Yeganeh Kay Kāvus Decagon Iranian Turkmen Iranian Art Museum Garden, which includes a replica of
Gonbad-e_Kavus
Archimedean solid with 62 faces
faces. It has 62 faces: 30 squares, 20 regular hexagons, and 12 regular decagons. It has the most edges and vertices of all Platonic and Archimedean solids
Truncated_icosidodecahedron
MMA promotion based in Japan
used a ring, and by Pancrase 258 on May 11, 2014, Pancrase adopted the decagon or the ten-sided cage of their American partners World Series of Fighting
Pancrase
Geometric patterns in Islamic architecture
in the spandrel of the Darb-i Imam shrine (see figure) consists only of decagons and bowties, while the subdivision rule uses an elongated hexagon tile
Girih
Lutheran church in Germany; second tallest church in the world
five stained glass windows of the apse, which is in the form of half a decagon, show Biblical scenes and date to the 14th and 15th century. The main organ
Ulm_Minster
Regular non-convex polygon
vertices (its corner tips) and five intersecting edges, while a concave decagon, |5/2|, has ten edges and two sets of five vertices. The first is used
Star_polygon
Period of cultural flourishing from 786 to 1258
tilings. These are formed using a set of five tile shapes, namely a regular decagon, an elongated hexagon, a bow tie, a rhombus, and a regular pentagon. All
Islamic_Golden_Age
Type of polyhedron
constructed as a truncated rhombicosidodecahedron. It has 122 faces: 12 decagons, 30 octagons, 20 hexagons, and 60 squares. Truncated small rhombicosidodecahedron
Truncated rhombicosidodecahedron
Truncated_rhombicosidodecahedron
Polyhedron with 32 faces
uniform polyhedron, indexed as U50. It has 32 faces (20 hexagons and 12 decagons), 120 edges, and 60 vertices. Its vertex figure is a crossed quadrilateral
Small_dodecicosahedron
24th Johnson solid (32 faces)
Johnson J23 – J24 – J25 Faces 3×5+10 triangles 5 squares 1 pentagon 1 decagon Edges 55 Vertices 25 Vertex configuration 5(3.4.5.4) 2.5(33.10) 10(34.4)
Gyroelongated pentagonal cupola
Gyroelongated_pentagonal_cupola
Uniform star polyhedron with 18 faces
faces (12 pentagons and 6 decagons), 60 edges, and 30 vertices. Its vertex figure alternates two regular pentagons and decagons as a crossed quadrilateral
Small_dodecahemidodecahedron
Polyhedral compound
Seen from 2-fold, 3-fold and 5-fold symmetry axes The decagon on the right is the Petrie polygon of both solids.
Compound of dodecahedron and icosahedron
Compound_of_dodecahedron_and_icosahedron
Honeycomb made from unique polyhedrons
ct{(5,3,5,3)} Coxeter diagrams or Cells t{5,3} {3,5} Faces triangle {3} decagon {10} Vertex figure pentagonal antiprism Coxeter group [[(5,3)[2]]], Properties
Dodecahedral-icosahedral honeycomb
Dodecahedral-icosahedral_honeycomb
Subdivision of the plane by lines
arrangement formed by 20 lines, the sides and symmetry axes of a regular decagon. Adding the line at infinity produces another simplicial arrangement with
Arrangement_of_lines
2-D shapes in which sides intersect
A symmetric crossed decagon
Crossed_polygon
Figurate number representing a decagon
number that extends the concept of triangular and square numbers to the decagon (a ten-sided polygon). However, unlike the triangular and square numbers
Decagonal_number
Angle the planets make to each other in the horoscope
2/5 1/8 3/8 1/10 3/10 Regular Polygon Monogon Digon Triangle Square Hexagon Dodecagon Dodecagram Pentagon Pentagram Octagon Octagram Decagon Decagram
Astrological_aspect
pentagons 60 30 3,5,3,5 truncated dodecahedron (Video) 32 20 triangles 12 decagons 90 60 3,10,10 truncated icosahedron or commonly football (soccer ball)
Solids with icosahedral symmetry
Solids_with_icosahedral_symmetry
total: 80+320 {3} Edges 240 Vertices 40 Vertex figure Octahedral prism Petrie polygon Decagon Coxeter groups BC5, [3,3,3,4] D5, [32,1,1] Properties convex
Rectified_5-orthoplexes
Regular tiling of hyperbolic 3-space
3,5} t0,1{5,3,5} Coxeter diagram Cells t{5,3} {3,5} Faces triangle {3} decagon {10} Vertex figure pentagonal pyramid Coxeter group K ¯ 3 {\displaystyle
Order-5 dodecahedral honeycomb
Order-5_dodecahedral_honeycomb
Japanese manga series
October 8, 2023. Mateo, Alex (May 15, 2023). "Kodansha Comics Licenses The Decagon House Murders, Yamaguchi-kun Isn't So Bad, Chihiro-kun Only Has Eyes For
Mr._Bride
Mixed martial arts combat sport promoter
current PFL fighters Riyadh Season Axson, Scooby. "PFL steps into the 'decagon' with new ideas for MMA and Claressa Shields". USA TODAY. Goldsmith, Jill
Professional_Fighters_League
3d shape
best to show the pentagram boundary line to distinguish it from a concave decagon. Net (fold the dotted line in the centre in the opposite direction to all
Pentagrammic_antiprism
Yukito Ayatsuji. Shimada first appeared in Ayatsuji's debut novel The Decagon House Murders (1987), part of his Bizarre House/Mansion Murders series
List_of_fictional_detectives
Brazilian martial artist
the fight via submission in the first round. Gracie returned to the WSOF decagon on July 5, 2014 at World Series of Fighting 11: Gaethje vs. Newell, facing
Neiman_Gracie
80th Johnson solid (42 faces)
Johnson J79 – J80 – J81 Faces 10 triangles 2×10 squares 10 pentagons 2 decagons Edges 90 Vertices 50 Vertex configuration 20(4.5.10) 10+20(3.4.5.4) Symmetry
Parabidiminished rhombicosidodecahedron
Parabidiminished_rhombicosidodecahedron
Natural number
numbers, and a dodecahedral number. If all of the diagonals of a regular decagon are drawn, the resulting figure will have exactly 220 regions. It is the
220_(number)
pentagon 6 hexagon 7 heptagon septagon 8 octagon 9 enneagon nonagon 10 decagon 11 hendecagon undecagon 12 dodecagon 13 tridecagon triskaidecagon 14 tetradecagon
List_of_polygons
Japanese actor
Japanese). July 14, 2023. Retrieved August 18, 2023. "Live-Action The Decagon House Murders Series Reveals Cast in New Trailer". Anime News Network.
Ayumu_Mochizuki
Distance-transitive cubic graph with 20 nodes and 30 edges
regular decagon, and connect the other ten vertices into a ten-pointed star that connects pairs of vertices at distance three in a second decagon. The Desargues
Desargues_graph
2020 (commemorative coins) ₱2 31 mm (across corners, decagon) 29.8 mm (across flats, decagon) 2mm 12 g Plain State title, Andrés Bonifacio, year of
Flora_and_Fauna_Series
Four-dimensional analogues of the regular polyhedra in three dimensions
600-cells Great polygons 2 squares x 3 4 rectangles x 4 4 hexagons x 4 12 decagons x 6 100 irregular hexagons x 4 Petrie polygons 1 pentagon x 2 1 octagon
Regular_4-polytope
Five tiles used in Islamic decorative art
perpendicular lines. Some have additional symmetries. Specifically, the decagon has tenfold rotational symmetry (rotation by 36°); and the pentagon has
Girih_tile
Regular tiling of hyperbolic 3-space
3,4} t{5,31,1} Coxeter diagram ↔ Cells t{5,3} {3,4} Faces triangle {3} decagon {10} Vertex figure square pyramid Coxeter group B H ¯ 3 {\displaystyle
Order-4 dodecahedral honeycomb
Order-4_dodecahedral_honeycomb
All Latin and Greek roots beginning with G
"ten-fold" decem, "ten" decies, "ten times" decumo, "tenfold" decad, decade, decagon, decagram, decahedron, Decalogue, decamer, decamerous, decameter, decapod
List of Greek and Latin roots in English/A–G
List_of_Greek_and_Latin_roots_in_English/A–G
Instrument to measure soil water content
Publishing, 2008 ISBN 0643094709 pages 79-81 Decagon Devices "List of peer-reviewed publications using Decagon soil moisture sensors Archived 2016-03-04
Soil_moisture_sensor
Natural number, composite number
2016-03-03. Retrieved 2023-01-18. Baez, John C. (February 2015). "Pentagon-Decagon Packing". AMS Blogs. American Mathematical Society. Retrieved 2023-01-18
14_(number)
Polyhedron with 12 faces
Johnson solid with five triangles, five squares, one pentagon, and one decagon. It is C5v symmetry of order 10. Snub disphenoid: both Johnson solid and
Dodecahedron
Polyhedral compound
icosidodecahedron, with rectangular faces, alongside irregular hexagons and decagons, each alternating two different edge lengths. Together with its convex
Compound of two snub dodecahedra
Compound_of_two_snub_dodecahedra
2020 role-playing video game
Arc (2019–2024) Human Lost (2019) Weathering with You (2019–2020) The Decagon House Murders (2019–2022) 2020s Sing a Bit of Harmony (2021–2022) Chaos
Omori_(video_game)
areas of the squares on the sides of the regular hexagon and the regular decagon inscribed in the same circle. In the language of modern trigonometry, this
List of trigonometric identities
List_of_trigonometric_identities
2020 (commemorative coins) ₱2 31 mm (across corners, decagon) 29.8 mm (across flats, decagon) 2mm 12 g Plain State title, Andrés Bonifacio, year of
Coins_of_the_Philippine_peso
Mathematical model of the physical space
600-cells Great polygons 2 squares x 3 4 rectangles x 4 4 hexagons x 4 12 decagons x 6 100 irregular hexagons x 4 Petrie polygons 1 pentagon x 2 1 octagon
Euclidean_geometry
Unit of measurement of an angle, equal to 1/400th of a circle
SI symbol Name Value SI symbol Name 10−1 gon dgon decigon 101 gon dagon decagon 10−2 gon cgon centigon 102 gon hgon hectogon 10−3 gon mgon milligon 103 gon
Gradian
Skew polygon derived from a polytope
polygon of the dodecahedron is a skew decagon. Seen from the solid's 5-fold symmetry axis it looks like a regular decagon. Every pair of consecutive sides
Petrie_polygon
International airport near Dublin, Ireland
included a second pier which would have been identical to the current decagon-shaped boarding Pier B, but this was never built. A car park was originally
Dublin_Airport
Chemical compound
all minimize the energy locally. The all-cis isomer (1), a fully convex decagon, would have bond angles of 144°, which creates large amounts of angle strain
Cyclodecapentaene
With mirrors An alternate construction exists from the [(5,5,3)] family, as the omnitruncation t012(5,5,3). It is shown with two (colors) of decagons.
Truncated order-6 pentagonal tiling
Truncated_order-6_pentagonal_tiling
Coins by shape
other shapes, including squares, diamonds, hexagons, heptagons, octagons, decagons, and dodecagons. They have also been struck with scalloped (wavy) edges
Coinage_shapes
Numerical prefix meaning "ten"
ten-yearly or a celebration of ten years. Decimal based on the number ten. Decagon a plane figure with ten sides Decahedron a polyhedron with ten faces Decane
Deca-
with 12 decagons in the gaps. It is constructed from a triakis icosahedron by truncating the order-10 vertices. This creates 12 regular decagon faces,
Truncated_triakis_icosahedron
Uniform star polyhedron with 26 faces
faces (20 triangles and 6 decagons), 60 edges, and 30 vertices. Its vertex figure alternates two regular triangles and decagons as a crossed quadrilateral
Small_icosihemidodecahedron
Natural number
decagonal number. 126 is also the different number of ways to partition a decagon into even polygons by diagonals, and the number of crossing points among
126_(number)
DECAGON
DECAGON
DECAGON
DECAGON
Boy/Male
Indian
Allah, Another name of God
Girl/Female
Indian, Telugu
Thrust
Boy/Male
Muslim
Great and blessed person
Girl/Female
Latin
An Amazon.
Girl/Female
Muslim
Golden
Boy/Male
French
Little wolf.
Boy/Male
Irish
Swarthy.
Boy/Male
Tamil
One who struggles
Girl/Female
Indian
Alphabet; Letter
Boy/Male
Arabic
Grandeur; Glory
DECAGON
DECAGON
DECAGON
DECAGON
DECAGON
a.
Pertaining to a decagon; having ten sides.
n.
A plane figure having ten sides and ten angles; any figure having ten angles. A regular decagon is one that has all its sides and angles equal.