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Catalan solid with 12 faces
interpretation is also expressed in the name, triakis, which is used for Kleetopes of polyhedra with triangular faces. The triakis tetrahedron is a Catalan solid, the
Triakis_tetrahedron
Catalan solid with 60 faces
elevatum. The capsid of the Hepatitis A virus has the shape of a triakis icosahedron. The triakis icosahedron can be formed by gluing triangular pyramids to
Triakis_icosahedron
Genus of sharks
Triakis is a genus of houndsharks in the family Triakidae. The name comes from the Ancient Greek word τρι- (tri-) meaning 'three', and the Latin word
Triakis
Catalan solid with 24 faces
polyhedra and tilings, page 284, Triakis octahedron) Weisstein, Eric W., "Triakis octahedron" ("Catalan solid") at MathWorld. Triakis Octahedron – Interactive
Triakis_octahedron
Species of shark
"catshark". The genus Triakis contains two subgenera, Triakis and Cazon. The leopard shark is placed within the subgenus Triakis along with the banded
Leopard_shark
Space-filling polyhedron with 16 faces
to tessellate three-dimensional space, making the triakis truncated tetrahedral honeycomb. The triakis truncated tetrahedron is the shape of the Voronoi
Triakis_truncated_tetrahedron
13 polyhedra; duals of the Archimedean solids
examples are Kleetopes of Platonic solids: triakis tetrahedron, tetrakis hexahedron, triakis octahedron, triakis icosahedron, and pentakis dodecahedron.
Catalan_solid
Triangle with at least two sides congruent
triakis triangular tiling. Five Catalan solids, the triakis tetrahedron, triakis octahedron, tetrakis hexahedron, pentakis dodecahedron, and triakis icosahedron
Isosceles_triangle
Near-miss Johnson solid with 16 faces
a triakis tetrahedron by truncating the order-6 vertices. The truncated vertices become four hexagon faces, and the obtuse triangles of the triakis tetrahedron
Truncated_triakis_tetrahedron
Family of sharks
split into two subfamilies, with the genera Mustelus, Scylliogaleus and Triakis in the subfamily Triakinae, and the remainders in the subfamily Galeorhininae
Houndshark
The truncated triakis icosahedron, or more precisely an order-10 truncated triakis icosahedron, is a convex polyhedron with 72 faces: 20 sets of 3 pentagons
Truncated_triakis_icosahedron
The truncated triakis octahedron, or more precisely an order-8 truncated triakis octahedron, is a convex polyhedron with 30 faces: 8 sets of 3 pentagons
Truncated_triakis_octahedron
Archimedean solid with 8 faces
name "triakis". It is classified as plesiohedron, meaning it can tessellate in three-dimensional space known as honeycomb; an example is triakis truncated
Truncated_tetrahedron
Modular origami module
vertices), or triakis tetrahedron. Building a pyramid on each face of a regular octahedron, using twelve Sonobe units, results in a triakis octahedron.
Sonobe
Polyhedron with 12 faces
dodecahedron is a tetartoid with more than the required symmetry. The triakis tetrahedron is a degenerate case with 12 zero-length edges. (In terms of
Dodecahedron
Polyhedron with 60 faces
In geometry, the great triakis icosahedron is a nonconvex isohedral polyhedron. It is the dual of the uniform great stellated truncated dodecahedron.
Great_triakis_icosahedron
Semiregular tiling of a plane
leaf, although the name also applies to other triakis shapes like the triakis icosahedron and triakis octahedron. It is the dual tessellation of the
Truncated_hexagonal_tiling
Polyhedron with 24 faces
Press, ISBN 978-0-521-54325-5, MR 0730208 Mathworld - Great Triakis Octahedron Mathworld - Small Triakis Octahedron Uniform polyhedra and duals v t e
Great_triakis_octahedron
Space-filling tessellation
The triakis truncated tetrahedral honeycomb is a space-filling tessellation (or honeycomb) in Euclidean 3-space made up of triakis truncated tetrahedra
Triakis truncated tetrahedral honeycomb
Triakis_truncated_tetrahedral_honeycomb
Kepler–Poinsot polyhedron
pentagrammic faces are broken into triangles, it is topologically related to the triakis icosahedron, with the same face connectivity, but much taller isosceles
Great_stellated_dodecahedron
Disused scientific name
in recording the dates of publication resulted in the widespread use of Triakis semifasciata as the shark's scientific name. After this long-standing error
Nomen_oblitum
Quasiregular space-filling tesselation
an order-3 truncated triakis tetrahedron. This honeycomb is the dual of the triakis truncated tetrahedral honeycomb, with triakis truncated tetrahedral
Tetrahedral-octahedral honeycomb
Tetrahedral-octahedral_honeycomb
Geometric operation which truncates the edges of polyhedra
containing triangular and hexagonal faces. Its dual is the alternate-triakis tetratetrahedron. chamfered cube: from a cube, the resulting polyhedron
Chamfer_(geometry)
Archimedean solid with 14 faces
and 24 vertices. If the truncated cube has unit edge length, its dual triakis octahedron has edges of lengths 2 and δS +1, where δS is the silver ratio
Truncated_cube
(flap-nose houndshark) Genus Triakis J. P. Müller & Henle, 1838 Triakis acutipinna Kato, 1968 (sharp-fin houndshark) Triakis maculata Kner & Steindachner
List_of_sharks
Method of describing higher-order polyhedra
bD = bI snub dodecahedron sD = sI Catalan Triakis tetrahedron kT Rhombic dodecahedron jC = jO = oT Triakis octahedron kO Tetrakis hexahedron kC = mT Deltoidal
Conway_polyhedron_notation
Polyhedron with 60 faces
Deltoidal hexecontahedron - kites Pentagonal hexecontahedron - pentagons Triakis icosahedron - isosceles triangles Concave Rhombic hexecontahedron - rhombi
Hexecontahedron
Species of shark
Transactions of the Royal Society of New Zealand. Garrick named the species Triakis attenuata, in reference to its extremely slender ("attenuate") body. In
Slender_smooth-hound
Concept in mathematics
with a Schläfli symbol of t{∞,3}. The dual tiling, the infinite-order triakis triangular tiling, has face configuration V3.∞.∞. This hyperbolic tiling
Truncated order-3 apeirogonal tiling
Truncated_order-3_apeirogonal_tiling
Species of shark
Mustelus lineage. This result suggests that the two subgenera of Triakis—Cazon and Triakis—may not be closely related, which would warrant a redefinition
Sharptooth_houndshark
Decagonal antiprism, Dodecagonal antiprism Catalan solid Triakis tetrahedron, Rhombic dodecahedron, Triakis octahedron, Tetrakis hexahedron, Deltoidal icositetrahedron
List of polygons, polyhedra and polytopes
List_of_polygons,_polyhedra_and_polytopes
Species of shark
placed it in the genus Triakis. Within the genus, it is placed in the subgenus Triakis along with the leopard shark (T. (Triakis) semifasciata). Native
Banded_houndshark
Geometric object
with hexagonal pyramids augmented. Truncated triakis tetrahedron Truncated triakis octahedron Truncated triakis icosahedron George Hart's Polyhedron generator
Truncated_tetrakis_cube
dodecahedron Truncated great icosahedron Catalan solid Triakis tetrahedron Rhombic dodecahedron Triakis octahedron Tetrakis hexahedron Deltoidal icositetrahedron
List_of_mathematical_shapes
Archimedean solid with 32 faces
{\displaystyle 3\cdot 10^{2}} . The dual of a truncated dodecahedron is triakis icosahedron, a Catalan solid, which shares the same symmetry as the truncated
Truncated_dodecahedron
Shape in hyperbolic geometry
include the rhombic dodecahedron and the triakis tetrahedron. Removing certain triples of vertices from the triakis tetrahedron separates the remaining vertices
Ideal_polyhedron
Tiling by polygons whose reflections across edges are other tiles
Triangular tiling Tetrakis square tiling Kisrhombille tiling Hexagonal tiling Rhombille tiling Deltoidal trihexagonal tiling Triakis triangular tiling
Edge_tessellation
Removal of alternate vertices
triacontahedron Triakis tetrahedron Dual of truncated tetrahedron Truncated triakis tetrahedron Triakis octahedron Dual of truncated cube Truncated triakis octahedron
Alternation_(geometry)
Polyhedron with 14 faces
4/3 Symmetry group Oh, [4,3], *432 Index references U19, C66, W92 Dual polyhedron Great triakis octahedron Vertex figure 3.8/3.8/3 Bowers acronym Quith
Stellated truncated hexahedron
Stellated_truncated_hexahedron
Species of shark
Hemitriakis Furgaleus Triakis semifasciata Galeorhinus Hypogaleus Triakis megalopterus + Scylliogaleus + Mustelus Phylogenetic relationships of the whiskery
Whiskery_shark
Triangular prism capped with tetrahedra
The elongated triangular bipyramid or elongated triangular dipyramid is a polyhedron constructed from a triangular prism by attaching two regular tetrahedra
Elongated triangular bipyramid
Elongated_triangular_bipyramid
(eds.). "Triakis acutipinna". FishBase. March 2013 version. Dulvy, N.K.; Acuña, E.; Bustamante, C.; Herman, K.; Velez-Zuazo, X. (2020). "Triakis maculata"
List_of_threatened_sharks
Early predecessor company to Microsoft
open time on the mainframe computer. Wennberg, later the founder of the Triakis Corporation, was an electrical engineering student at the University of
Traf-O-Data
Type of crystal structure
Scientific study of crystal structures Laves graph – Periodic spatial graph Triakis truncated tetrahedral honeycomb – Space-filling tessellation Kobashi, Koji
Diamond_cubic
"Leopard Shark, Triakis semifasciata". 4 August 2023. Archived from the original on 11 October 2018. Retrieved 11 October 2018. "Triakis semifasciata, Leopard
List of marine aquarium fish species
List_of_marine_aquarium_fish_species
Theorem in graph theory and polyhedral combinatorics
whose two endpoints have total degree at most 13. An extreme case is the triakis icosahedron, where no edge has smaller total degree. The result is named
Kotzig's_theorem
Polytope made by turning a polytope's facets into pyramids
solids: The triakis tetrahedron is the Kleetope of a tetrahedron, the triakis octahedron is the Kleetope of an octahedron, and the triakis icosahedron
Kleetope
Disorder causing lack of pigmentation
(Orectolobus japonicus) Java shark (Carcharhinus amboinensis) Leopard shark (Triakis semifasciata) Narrownose smooth-hound (Mustelus schmitti) Porbeagle (Lamna
Albinism
Edge-joined polygons which fold into a polyhedron
Truncated icosidodecahedron Icosidodecahedron Snub cube Snub dodecahedron Triakis tetrahedron Snub disphenoid Triangular orthobicupola Cardboard modeling
Net_(polyhedron)
Two tetrahedra crossing each other
non-convex polyhedron with the same combinatorial structure as the convex triakis octahedron, a Catalan solid with much shorter pyramids. Any of these pyramid
Stellated_octahedron
Polyhedron with 32 faces
group Ih, [5,3], *532 Index references U66, C83, W104 Dual polyhedron Great triakis icosahedron Vertex figure 3.10/3.10/3 Bowers acronym Quit Gissid
Great stellated truncated dodecahedron
Great_stellated_truncated_dodecahedron
"star-like" polyhedron). In this same work, da Vinci illustrates a concaved triakis icosahedron, which shares its outer shell with the great stellated dodecahedron
List of polyhedral stellations
List_of_polyhedral_stellations
Inlet of the Pacific Ocean in Marin County, California, US
Joshua (2000). "Tidal Influence on Spatial Dynamics of Leopard Sharks, Triakis semifasciata, in Tomales Bay, California". Environmental Biology of Fishes
Tomales_Bay
Marked objects for finding random numbers
Truncated sphere A truncated sphere with twenty-three landing positions. 24 Triakis octahedron Each face is an isosceles triangle. Tetrakis hexahedron Each
Dice
Generalisation of dice with identical faces
V53 Platonic regular icosahedron Ih, [5,3], (*532) 120 12 V3.62 Catalan triakis tetrahedron Td, [3,3], (*332) 24 12 V(3.4)2 Catalan rhombic dodecahedron
Isohedral_figure
Species of shark
"Spotted houndshark (Triakis maculata)". Sharks of the World. Marine Species Information Portal. Retrieved 2014-08-29. "Triakis maculata Kner & Steindachner
Spotted_houndshark
Solid with four equal triangular faces
tetrahedron, it becomes a truncated tetrahedron. The dual of this solid is the triakis tetrahedron, a regular tetrahedron with four triangular pyramids attached
Regular_tetrahedron
Tiling of euclidean or hyperbolic space of three or more dimensions
triangular prismatic honeycomb The gyrated triangular prismatic honeycomb The triakis truncated tetrahedral honeycomb. The Voronoi cells of the carbon atoms
Honeycomb_(geometry)
Polyhedron which tiles 3D space
taking every tile to every other tile, including the gyrobifastigium, the triakis truncated tetrahedron, and the trapezo-rhombic dodecahedron. The cube is
Space-filling_polyhedron
Natural number
binary numbers whose bitwise exclusive or is zero. Per Miller's rules, the triakis tetrahedron produces 187 distinct stellations. It is the smallest Catalan
187_(number)
Species of shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Spiny_dogfish
Predatory cartilaginous fishes
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Shark
Species of shark
Wikimedia Commons has media related to Triakis acutipinna. Compagno, L.J.V.; Kyne, P.M. & Domingo, A. (2009). "Triakis acutipinna". The IUCN Red List of Threatened
Sharpfin_houndshark
Graph formed by subdivision of triangles
The triakis tetrahedron, a polyhedral realization of an 8-vertex Apollonian network
Apollonian_network
Species of shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Lemon_shark
Flat-sided three-dimensional shape
pyramid (a prismatoid), truncated tetrahedron (an Archimedean solid), triakis icosahedron (a Catalan solid), and triaugmented triangular prism (a Johnson
Polyhedron
Elasmobranch fish in the family Ginglymostomatidae
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Nurse_shark
Family of sharks
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Wobbegong
Solid with eight equal triangular faces
in six squares and eight hexagons, leaving out six square pyramids. The triakis octahedron is a Catalan solid, the Kleetope of a regular octahedron, by
Regular_octahedron
Species of shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Brazilian_whitetail_dogfish
Catalan solid with 24 kite faces
created by enlarging 12 of the 24 faces of a dyakis dodecahedron. The great triakis octahedron is a stellation of the deltoidal icositetrahedron. Tetrakis
Deltoidal_icositetrahedron
Public aquarium in San Diego, California, United States
submersible on display. Diamond stingray (Hypanus dipterurus). Leopard shark (Triakis semifasciata). Zebra bullhead sharks (Heterodontus zebra). Little penguins
Birch_Aquarium_at_Scripps
Semiregular tiling of the hyperbolic plane
vertex configuration of 3.14.14. The dual tiling is called an order-7 triakis triangular tiling, seen as an order-7 triangular tiling with each triangle
Truncated_heptagonal_tiling
3D symmetry group
truncated tetrahedron 8 18 12 Catalan solid triakis tetrahedron 12 18 8 Near-miss Johnson solid Truncated triakis tetrahedron 16 42 28 Tetrated dodecahedron
Tetrahedral_symmetry
Order of sharks
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Carpet_shark
Polyhedral compound
Faces 20 triangles, 20 hexagons Edges 90 Vertices 60 Dual Compound of five triakis tetrahedra Symmetry group chiral icosahedral (I) Subgroup restricting to
Compound of five truncated tetrahedra
Compound_of_five_truncated_tetrahedra
Book on stellations of the regular icosahedron by H. S. M. Coxeter and colleagues
Regular convex triangular Regular icosahedron, a Platonic solid 2 B 1 26 Triakis icosahedron 2 Hexagonal Taf. VIII, Fig. 2 First stellation of the icosahedron
The_Fifty-Nine_Icosahedra
Species of shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Pacific_sleeper_shark
Eeckhaut, 2010 Triakis Müller & Henle, 1838 †Triakis antunesi Noubhani & Cappetta, 1997 †Triakis beali Jordan & Gilbert, 1919 †Triakis chalossensis Adnet
List of prehistoric cartilaginous fish genera
List_of_prehistoric_cartilaginous_fish_genera
Species of requiem shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Oceanic_whitetip_shark
(Sphyrna mokarran) Smalleye hammerhead (Sphyrna tudes) Spotted houndshark (Triakis maculata) Sand tiger shark (Carcharius taurus) Shorttail nurse shark (Pseudoginglymostoma
List of critically endangered fishes
List_of_critically_endangered_fishes
LC IUCN Speckled smooth-hound Mustelus mento CR IUCN Spotted houndshark Triakis maculata CR IUCN Silvertip shark Carcharhinus albimarginatus VU IUCN Graceful
List of animals in the Galápagos Islands
List_of_animals_in_the_Galápagos_Islands
Concept in mathematics
symbol t{8,3} Wythoff symbol 2 3 | 8 Coxeter diagram Symmetry group [8,3], (*832) Dual Order-8 triakis triangular tiling Properties Vertex-transitive
Truncated_octagonal_tiling
Species of ground shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Tiger_shark
3D shape made of polyhedra sharing a common center
Truncated tetrahedron (light) and triakis tetrahedron (dark)
Polytope_compound
brunneus, SJ SG NS SS HC Soupfin shark, Galeorhinus galeus, SS Leopard shark, Triakis semifasciata, BB Blue shark, Prionace glauca, NS Bluntnose sixgill shark
List of fishes of the Salish Sea
List_of_fishes_of_the_Salish_Sea
Family of fishes
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Sawshark
Species of shark
Portugal. Brito Capelo thought the specimen resembled a member of the genus Triakis, except lacking a nictitating membrane (though it is now known that this
False_catshark
Prefix derived from numerals or other numbers
— — — — — 3 tri- ter- tern-, trin- terti- tri- tris- ("thrice") common triakis- ("thrice") rare triplo- ("triple") triad- ("three of a kind") trit- ("third")
Numeral_prefix
Animals classified as endangered by the IUCN
subpopulation) Sphyrna mokarran Hemitriakis leucoperiptera Mustelus schmitti Triakis acutipinna Cetorhinus maximus (Northeast Atlantic subpopulation) Cetorhinus
IUCN Red List endangered species (Animalia)
IUCN_Red_List_endangered_species_(Animalia)
Species of shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Ganges_shark
hexagonal tiling (truncated hextille) 3.12.12 2 3 | 6 p6m, [6,3], (*632) Triakis triangular tiling (kisdeltille) Triangular tiling (deltille) 3.3.3.3.3
List of Euclidean uniform tilings
List_of_Euclidean_uniform_tilings
Primitive cell of crystal lattices with Voronoi decomposition applied
voronoi decomposition of the diamond crystal structure is actually the triakis truncated tetrahedral honeycomb. Another example is applying Voronoi decomposition
Wigner–Seitz_cell
Species of shark
whitneyi) M. widodoi Scylliogaleus Flapnose houndshark (S. quecketti) Triakis Sharpfin houndshark (T. acutipinna) Spotted houndshark (T. maculata) Sharptooth
Blue_shark
Species of fish
T. B. (2005). "Reproduction, diet, and habitat use of leopard sharks, Triakis semifasciata (Girard), in Humboldt Bay, California, USA". Marine and Freshwater
Jack_silverside
Bocce competition
Yassine Ouinaksi Turkey Cem Şimşek Erdal Kantemir Algeria Ali Hakim Ahmed Triaki Libya Rashed Al-Swesi Abdulmohaimen Zantoute Women's singles Rukiye Varol
Bocce at the 2021 Islamic Solidarity Games
Bocce_at_the_2021_Islamic_Solidarity_Games
Species of carpet sharks
applied to the spotted adult, but that name usually refers to the houndshark Triakis semifasciata, and is also sometimes used for the tiger shark (Galeocerdo
Zebra_shark
Slovak-Canadian mathematician
whose two endpoints have total degree at most 13. An extreme case is the triakis icosahedron, where no edge has smaller total degree. Kotzig published the
Anton_Kotzig
Group of marine animals ("spoon worms")
November 2011. Tallent, L.G. (1976). "Food habits of the leopard shark, Triakis semifasciata, in Elkhorn Slough, Monterey Bay, California". California
Echiura
Type of space-filling polyhedron
and silver rectangles, is a plesiohedron. The triakis truncated tetrahedron, the prototile of the triakis truncated tetrahedral honeycomb and the plesiohedron
Plesiohedron
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