different between pentagon vs icosidodecahedron

English

Etymology

From Middle French pentagone, from Late Latin pentag?num, from Ancient Greek ?????????? (pentág?non), noun use of the neuter of the adjective ?????????? (pentág?nos, “five-angled”), from ????? (pénte, “five”) + -????? (-g?nos, “angled”). Equivalent to penta- +? -gon.

Pronunciation

• (US, Canada) enPR: p?n't?g?n, IPA^(key): /?p?n.t?.??n/
• (UK) enPR: p?n't?g?n, IPA^(key): /?p?n.t?.??n/
• Hyphenation: pen?ta?gon

Noun

pentagon (plural pentagons)

1. (geometry) A polygon with five sides and five angles.
2. A fort with five bastions.

Derived terms

• pentagonal

Translations

See also

• Wikipedia article on pentagons
• pentagram
• quinquangle

Anagrams

• pantogen

Danish

Noun

pentagon c (singular definite pentagonen, plural indefinite pentagoner)

1. pentagon

Declension

Synonyms

• femkant

Related terms

• pentagonal

References

• “pentagon” in Den Danske Ordbog

Norwegian Bokmål

Etymology

From penta- +? -gon

Noun

pentagon m (definite singular pentagonen, indefinite plural pentagoner, definite plural pentagonene)

1. (geometry) a pentagon

Synonyms

• femkant

References

• “pentagon” in The Bokmål Dictionary.
• “pentagon” in Det Norske Akademis ordbok (NAOB).

Norwegian Nynorsk

Etymology

From penta- +? -gon

Noun

pentagon m (definite singular pentagonen, indefinite plural pentagonar, definite plural pentagonane)

1. (geometry) a pentagon

Synonyms

• femkant

References

• “pentagon” in The Nynorsk Dictionary.

Romanian

Etymology

From French pentagone, from Latin pentagonus.

Noun

pentagon n (plural pentagoane)

1. Pentagon

Declension

English

Noun

icosidodecahedron (plural icosidodecahedra or icosidodecahedrons)

1. An Archimedean solid with thirty-two regular faces (twelve pentagons and twenty triangles).
   • 1961, The New Yorker, Volume 37, Part 4, page 172,

     […] together to form not only regular polyhedrons but rhombicosidodecahedrons, truncated icosidodecahedrons, and such.

   • 1992, Jean-Louis Verger-Gaugry, Quasicrystals and the Concept of Interpenetration in m35-approximant Crystals with Long-range Icosahedral Atomic Clustering, A. R. Yavari, Ordering and Disordering in Alloys, Elsevier Applied Science, page 498,

     A succession of 10 concentric icosidodecahedra centered at (0, 0, 0), forming a geometric sequence (the n^th one is ?ⁿ larger than the first one), is also put into evidence.

   • 2004, Marc-Alain Ouaknin, The Mystery of Numbers, unnumbered page,

     Thus, there is a star octahedron, three star dodecahedrons, and fifty-nine star icosidodecahedrons.

   • 2009, Walter Steurer, Sofia Deloudi, Crystallography of Quasicrystals: Concepts, Methods and Structures, page 306,

     The dark-gray (online: red) icosahedra are part of the B clusters, the light-gray dodecahedra of the B’ clusters, and the (online: blue) icosidodecahedra of the M clusters.

   • 2010, Debra Ann Ross, Master Math: Geometry, Cengage Learning, page 306,

     Polyhedrons include prisms; pyramids; the Platonic solids, including tetrahedrons, cubes, octahedrons, dodecahedrons, and icosahedrons; the Archimedean solids, such as cuboctahedrons and icosidodecahedrons; and the Johnson solids, such as square pyramids and triangular cupolas (dome-shape).

Derived terms

• rhombicosidodecahedron
• truncated icosidodecahedron

Translations