List of Johnson solids

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Short description: All 92 Johnson Solids listed here


In geometry, polyhedra is a three-dimensional object with lines meeting at a point that forms polygons. The points, lines, and polygons of polyhedra are respectively known as the vertices, edges, and faces.[1] A polyhedron is said to be convex if, for every two points inside the polyhedron, there is a line connecting them that lies within the polyhedra as well;[2] its faces are not coplanar (meaning every face are not in the same plane) and its edges are not colinear (meaning the edges are not in the same line).[3] A polyhedron is said to be regular if every polygonal faces are equilateral and equiangular,[4] and those with the polyhedron has vertex-transitive property are called a uniform polyhedron.[5] A Johnson solid (or Johnson–Zalgaller solid) is a convex polyhedron with its faces are regular polygons. Some authors do not require that the Johnson solid not be uniform, meaning that the Johnson solids may not be Platonic solid, Archimedean solid, prism, or antiprism.[6]

The 92 convex polyhedrons were published by Norman Johnson, conjecturing that there are no other solids. His conjecture was proved by Victor Zalgaller proved in 1969 that Johnson's list was complete.[7] Pyramids, cupolae, and rotunda are the first six Johnson solids that have regular faces and convexity. These solids may be applied to construct another polyhedron that has the same properties, a process known as augmentation; attaching prism or antiprism to those is known as elongation or gyroelongation, respectively. Some others may be constructed by diminishment, the removal of those from the component of polyhedra, or by snubification, a construction by cutting loose the edges, lifting the faces and rotate in certain angle, after which adding the equilateral triangles between them.[8]

Every polyhedra has own characteristics, including symmetry and measurement. An object is said to be symmetrical if there is such transformation preserving the immunity to change. All of those transformations may be composed in a concept of group, alongside the number of elements, known as order. In two-dimensional space, these transformations include rotating around the center of a polygon and reflecting an object around the perpendicular bisector of a polygon. A polygon that is rotated symmetrically in 360n is denoted by Cn, a cyclic group of order n; combining with the reflection symmetry results in the symmetry of dihedral group Dn of order 2n.[9] In three-dimensional symmetry point groups, the transformation of polyhedra's symmetry includes the rotation around the line passing through the base center, known as axis of symmetry, and reflection relative to perpendicular planes passing through the bisector of a base; this is known as the pyramidal symmetry Cnv of order 2n. Relatedly, polyhedra that preserve their symmetry by rotating it horizontally in 180 are known as prismatic symmetry Dnv of order 2n. The antiprismatic symmetry Dnd of order 4n preserving the symmetry by rotating its half bottom and reflection across the horizontal plane.[10] The symmetry group Cnh of order 2n preserve the symmetry by rotation around the axis of symmetry and reflection on horizontal plane; one case that preserves the symmetry by one full rotation and one reflection horizontal plane is C1h of order 2, or simply denoted as Cs.[11] The mensuration of polyhedra includes the surface area and volume. An area is a two-dimensional measurement calculated by the product of length and width, and the surface area is the overall area of all faces of polyhedra that is measured by summing all of them.[12] A volume is a measurement of the region in three-dimensional space.[13]

The following table contains the 92 Johnson solids of the edge length a. Each of the columns includes the enumeration of Johnson solid (Jn),[14] the number of vertices, edges, and faces, symmetry, surface area A and volume V.

Table of all 92 Johnson solids
Jn Solid name Image Vertices Edges Faces Symmetry group and its order[15] Surface area and volume[16]
1 Equilateral
square
pyramid
5 8 5 C4v of order 8 A=(1+3)a22.7321a2V=26a30.2357a3
2 Pentagonal
pyramid
6 10 6 C5v of order 10 A=a2252(10+5+75+305)3.8855a2V=(5+524)a30.3015a3
3 Triangular
cupola
9 15 8 C3v of order 6 A=(3+532)a27.3301a2V=(532)a31.1785a3
4 Square
cupola
12 20 10 C4v of order 8 A=(7+22+3)a211.5605a2V=(1+223)a31.9428a3
5 Pentagonal
cupola
15 25 12 C5v of order 10 A=(14(20+53+5(145+625)))a216.5798a2V=(16(5+45))a32.3241a3
6 Pentagonal
rotunda
20 35 17 C5v of order 10 A=(12(53+10(65+295)))a222.3472a2V=(112(45+175))a36.9178a3
7 Elongated
triangular
pyramid
7 12 7 C3v of order 6 A=(3+3)a24.7321a2V=(112(2+33))a30.5509a3
8 Elongated
square
pyramid
9 16 9 C4v of order 8 A=(5+3)a26.7321a2V=(1+26)a31.2357a3
9 Elongated
pentagonal
pyramid
11 20 11 C5v of order 10 A=20+53+25+1054a28.8855a2V=(5+5+625+10524)a32.022a3
10 Gyroelongated
square
pyramid
9 20 13 C4v of order 8 A=(1+33)a26.1962a2V=16(2+24+32)a31.1927a3
11 Gyroelongated
pentagonal
pyramid
11 25 16 C5v of order 10 A=14(153+5(5+25))a28.2157a2V=124(25+95)a31.8802a3
12 Triangular
bipyramid
5 9 6 D3h of order 12 A=332a22.5981a2V=26a30.2358a3
13 Pentagonal
bipyramid
7 15 10 D5h of order 20 A=532a24.3301a2V=112(5+5)a30.603a3
14 Elongated
triangular
bipyramid
8 15 9 D3h of order 12 A=32(2+3)a25.5981a2V=112(22+33)a30.6687a3
15 Elongated
square
bipyramid
10 20 12 D4h of order 16 A=2(2+3)a27.4641a2V=13(3+2)a31.4714a3
16 Elongated
pentagonal
bipyramid
12 25 15 D5h of order 20 A=52(2+3)a29.3301a2V=112(5+5+35(5+25))a32.3235a3
17 Elongated
square
bipyramid
10 24 16 D4d of order 16 A=43a26.9282a2V=112(5+5+35(5+25))a32.3235a3
18 Elongated
triangular
cupola
15 27 14 C3v of order 6 A=12(18+53)a213.3301a2V=13(2+4+32)a31.4284a3
19 Elongated
square
cupola
20 36 18 C4v of order 8 A=(15+22+3)a219.5605a2V=(3+823)a36.7712a3
20 Elongated
pentagonal
cupola
25 45 22 C5v of order 10 A=14(60+53+105+25+5(5+25))a226.5798a2V=16(5+45+155+25)a310.0183a3
21 Elongated
pentagonal
rotunda
30 55 27 C5v of order 10 A=12a2(20+53+55+25+35(5+25))32.3472a2V=112a3(45+175+305+25)14.612a3
22 Gyroelongated
triangular
cupola
15 33 20 C3v of order 6 A=12(6+113)a212.5263a2V=13612+183+301+3a33.5161a3
23 Gyroelongated
square
cupola
20 44 26 C4v of order 8 A=(7+22+53)a218.4887a2V=(1+232+234+22+2146+1032)a36.2108a3
24 Gyroelongated
pentagonal
cupola
25 55 32 C5v of order 10 A=14(20+253+105+25+5(5+25))a225.2400a2V=(56+235+562650+2905252)a39.0733a3
25 Gyroelongated
pentagonal
rotunda
30 65 37 C5v of order 10 A=12(153+(5+35)5+25)a231.0075a2V=(4512+17125+562650+2905252)a313.6671a3
26 Gyrobifastigium 8 14 8 D2d of order 8 A=(4+3)a25.7321a2V=(32)a30.866a3
27 Triangular
orthobicupola
12 24 14 D3h of order 12 A=2(3+3)a29.4641a2V=523a32.357a3
28 Square
orthobicupola
16 32 18 D4h of order 16 A=2(5+3)a213.4641a2V=(2+423)a33.8856a3
29 Square
gyrobicupola
16 32 18 D4d of order 16 A=2(5+3)a213.4641a2V=(2+423)a33.8856a3
30 Pentagonal
orthobicupola
20 40 22 D5h of order 20 A=(10+52(10+5+75+305))a217.7711a2V=13(5+45)a34.6481a3
31 Pentagonal
gyrobicupola
20 40 22 D5d of order 20 A=(10+52(10+5+75+305))a217.7711a2V=13(5+45)a34.6481a3
32 Pentagonal
orthocupolarotunda
25 50 27 C5v of order 10 A=(5+141900+4905+21075+305)a223.5385a2V=512(11+55)a39.2418a3
33 Pentagonal
gyrocupolarotunda
25 50 27 C5v of order 10 A=(5+1543+7425+105)a223.5385a2V=512(11+55)a39.2418a3
34 Pentagonal
orthobirotunda
30 60 32 D5h of order 20 A=((53+35(5+25))a229.306a2V=16(45+175)a313.8355a3
35 Elongated
triangular
orthobicupola
18 36 20 D3h of order 12 A=2(6+3)a215.4641a2V=(523+332)a34.9551a3
36 Elongated
triangular
gyrobicupola
18 36 20 D3d of order 12 A=2(6+3)a215.4641a2V=(523+332)a34.9551a3
37 Elongated
square
gyrobicupola
24 48 26 D4d of order 16 A=2(9+3)a221.4641a2V=(4+1023)a38.714a3
38 Elongated
pentagonal
orthobicupola
30 60 32 D5h of order 20 A=(20+52(10+5+75+305))a227.7711a2V=16(10+85+155+25)a312.3423a3
39 Elongated
pentagonal
gyrobicupola
30 60 32 D5d of order 20 A=(20+52(10+5+75+305))a227.7711a2V=16(10+85+155+25)a312.3423a3
40 Elongated
pentagonal
orthocupolarotunda
35 70 37 C5v of order 10 A=14(60+10(190+495+2175+305))a233.5385a2V=512(11+55+65+25)a316.936a3
41 Elongated
pentagonal
gyrocupolarotunda
35 70 37 C5v of order 10 A=14(60+10(190+495+2175+305))a233.5385a2V=512(11+55+65+25)a316.936a3
42 Elongated
pentagonal
orthobirotunda
40 80 42 D5h of order 20 A=(10+30(10+35+75+305))a239.306a2V=16(45+175+155+25)a321.5297a3
43 Elongated
pentaognal
gyrobirotunda
40 80 42 D5d of order 20 A=(10+30(10+35+75+305))a239.306a2V=16(45+175+155+25)a321.5297a3
44 Gyroelongated
triangular
bicupola
18 42 26 D3 of order 6 A=(6+53)a214.6603a2V=2(53+1+3)a34.6946a3
45 Gyroelongated
square
bicupola
24 56 34 D4 of order 8 A=(10+63)a220.3923a2V=(2+432+234+22+2146+1032)a38.1536a3
46 Gyroelongated
pentagonal
bicupola
30 70 42 D5 of order 10 A=12(20+153+25+105)a226.4313a2V=(53+435+562650+2905252)a311.3974a3
47 Gyroelongated
pentagonal
cupolarotunda
35 80 47 C5 of order 5 A=14(20+353+725+105)a232.1988a2V=(5512+25125+562650+2905252)a315.9911a3
48 Gyroelongated
pentagonal
birotunda
40 90 52 D5 of order 10 A=(103+325+105)a237.9662a2V=(456+1765+562650+2905252)a320.5848a3
49 Augmented
triangular
prism
7 13 8 C2v of order 4 A=12(4+33)a24.5981a2V=112(22+33)a30.6687a3
50 Biaugmented
triangular
prism
8 17 11 C2v of order 4 A=12(2+53)a25.3301a2V=(59144+16)a30.9044a3
51 Triaugmented
triangular
prism
9 21 14 D3h of order 12 A=732a26.0622a2V=22+34a31.1401a3
52 Augmented
pentagonal
prism
11 19 10 C2v of order 4 A=12(8+23+5(5+25))a29.173a2V=112233+905+1250+205a31.9562a3
53 Biaugmented
pentagonal
prism
12 23 13 C2v of order 4 A=12a2(6+43+5(5+25))9.9051a2V=112a3257+905+2450+2052.1919a3
54 Augmented
hexagonal
prism
13 22 11 C2v of order 4 A=(5+43)a211.9282a2V=16(2+93)a32.8338a3
55 Parabiaugmented
hexagonal
prism
Error creating thumbnail: Unable to save thumbnail to destination 14 26 14 D2h of order 8 A=(4+53)a212.6603a2V=16(22+93)a33.0695a3
56 Metabiaugmented
hexagonal
prism
14 26 14 C2v of order 4 A=(4+53)a212.6603a2V=16(22+93)a33.0695a3
57 Triaugmented
hexagonal
prism
15 30 17 D3h of order 12 A=3(1+23)a213.3923a2V=(12+332)a33.3052a3
58 Augmented
dodecahedron
21 35 16 C5v of order 10 A=14(53+115(5+25))a221.0903a2V=124(95+435)a37.9646a3
59 Parabiaugmented
dodecahedron
22 40 20 D5d of order 20 A=52(3+5(5+25))a221.5349a2V=16(25+115)a38.2661a3
60 Metabiaugmented
dodecahedron
22 40 20 C2v of order 4 A=52(3+5(5+25))a221.5349a2V=16(25+115)a38.2661a3
61 Triaugmented
dodecahedron
23 45 24 C3v of order 6 A=34(53+35(5+25))a221.9795a2V=58(7+35)a38.5676a3
62 Metabidiminished
icosahedron
10 20 12 C2v of order 4 A=12(53+5(5+25))a27.7711a2V=16(5+25)a31.5787a3
63 Tridiminished
icosahedron
9 15 8 C3v of order 6 A=14(53+35(5+25))a37.3265a3V=(58+7524)a31.2772a3
64 Augmented
tridiminished
icosahedron
10 18 10 C3v of order 6 A=14(73+35(5+25))a28.1925a2V=124(15+22+75)a31.395a3
65 Augmented
truncated
tetrahedron
15 27 14 C3v of order 6 A=12(6+133)a214.2583a2V=1122a33.8891a3
66 Augmented
truncated
cube
28 48 22 C4v of order 8 A=(15+102+33)a234.3383a2V=(8+1623)a315.5425a3
67 Biaugmented
truncated
cube
32 60 30 D4h of order 16 A=2(9+42+23)a236.2419a2V=(9+62)a317.4853a3
68 Augmented
truncated
dodecahedron
65 105 42 C5v of order 10 A=14(20+253+1105+25+5(5+25))a2102.1821a2V=(50512+8154)a387.3637a3
69 Parabiaugmented
truncated
dodecahedron
70 120 52 D5d of order 20 A=12(20+153+505+25+5(5+25))a2103.3734a2V=112(515+2515)a389.6878a3
70 Metabiaugmented
truncated
dodecahedron
70 120 52 C2v of order 4 A=12(20+153+505+25+5(5+25))a2103.3734a2V=112(515+2515)a389.6878a3
71 Triaugmented
truncated
dodecahedron
75 135 62 C3v of order 6 A=14(60+353+905+25+35(5+25))a2104.5648a2V=712(75+375)a392.0118a3
72 Gyrate
rhombicosidodecahedron
60 120 62 C5v of order 10 A=(30+53+35(5+25))a259.306a2V=(20+2953)a341.6153a3
73 Parabigyrate
rhombicosidodecahedron
60 120 62 D5d of order 20 A=(30+53+35(5+25))a259.306a2V=(20+2953)a341.6153a3
74 Metabigyrate
rhombicosidodecahedron
60 120 62 C2v of order 4 A=(30+53+35(5+25))a259.306a2V=(20+2953)a341.6153a3
75 Trigyrate
rhombicosidodecahedron
60 120 62 C3v of order 6 A=(30+53+35(5+25))a259.306a2V=(20+2953)a341.6153a3
76 Diminished
rhombicosidodecahedron
55 105 52 C5v of order 10 A=14(100+153+105+25+115(5+25))a258.1147a2V=(1156+95)a339.2913a3
77 Paragyrate
diminished
rhombicosidodecahedron
55 105 52 C5v of order 10 A=14(100+153+105+25+115(5+25))a258.1147a2V=(1156+95)a339.2913a3
78 Metagyrate
diminished
rhombicosidodecahedron
55 105 52 Cs of order 2 A=14(100+153+105+25+115(5+25))a258.1147a2V=(1156+95)a339.2913a3
79 Bigyrate
diminished
rhombicosidodecahedron
55 105 52 Cs of order 2 A=14(100+153+105+25+115(5+25))a258.1147a2V=(1156+95)a339.2913a3
80 Parabidiminished
rhombicosidodecahedron
50 90 42 D5d of order 20 A=52(8+3+25+25+5(5+25))a256.9233a2V=53(11+55)a336.9672a3
81 Metabidiminished
rhombicosidodecahedron
50 90 42 C2v of order 4 A=52(8+3+25+25+5(5+25))a256.9233a2V=53(11+55)a336.9672a3
82 Gyrate
bidiminished
rhombicosidodecahedron
50 90 42 Cs of order 2 A=52(8+3+25+25+5(5+25))a256.9233a2V=53(11+55)a336.9672a3
83 Tridiminished
rhombicosidodecahedron
45 75 32 C3v of order 6 A=14(60+53+305+25+95(5+25))a255.732a2V=(352+2353)a334.6432a3
84 Snub
disphenoid
8 18 12 D2d of order 8 A=2(1+33)a212.3923a2V0.8595a3
85 Snub
square
antiprism
16 40 26 D4d of order 16 A=2(1+33)a212.3923a2V3.6012a3
86 Sphenocorona 10 22 14 C2v of order 4 A=(2+33)a27.1962a2V=12a31+332+13+361.5154a3
87 Augmented
sphenocorona
11 26 17 Cs of order 2 A=(1+43)a27.9282a2V=12a31+332+13+36+1321.7511a3
88 Sphenomegacorona 12 28 18 C2v of order 4 A=2(1+23)a28.9282a2V1.9481a3
89 Hebesphenomegacorona 14 33 21 C2v of order 4 A=32(2+33)a210.7942a2V2.9129a3
90 Disphenocingulum 16 38 24 D2d of order 8 A=(4+53)a212.6603a2V3.7776a3
91 Bilunabirotunda 14 26 14 D2h of order 8 A=(2+23+5(5+25))a212.346a2V=112(17+95)a33.0937a3
92 Triangular
hebespenorotunda
18 36 20 C3v of order 6 A=14(12+193+35(5+25))a216.3887a2V=(52+756)a35.1087a3

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Notes

References