triacontagon

English

A triacontagon

Etymology

From Ancient Greek τρῐᾱ́κοντᾰ (trĭā́kontă) +‎ -gon.

Pronunciation

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Noun

triacontagon (plural triacontagons)

1. (geometry) A polygon with thirty sides.
   • 1947, H. S. M. Coxeter, Regular Polytopes, published 2012, unnumbered page:

     After projection onto the (x₁, x₂) plane, the A’s, B’s, C’s, and D’s form four concentric triacontagons, inscribed in circles of radii a, b, c, and d.

   • 1964 July, B. L. Chilton, On the Projection of the Regular Polytope {5, 3, 3} into a Regular Triacontagon, Canadian Mathematical Bulletin, Volume 7, Number 3, page 386,

     In the projection the 600 points can be classified in 12 sets: each set consists of either of 30 or of 60 vertices which lie on a circle concentric with the outer triacontagon.

   • 1997, Johannes Kepler, E. J. Aiton, Alistair Matheson Duncan, Judith Veronica Field (translators), The Harmony of the World, [1619, Harmonices Mundi], American Philosophical Society, Volume 309, page 59,

     What should the decision now be about the sides of the Triacontagon?

Synonyms

• 30-gon

Related terms

• triacontagonal

Translations

geometry

• Chinese:

  Mandarin: 三十邊形 / 三十边形 (sānshí biānxíng)

• Finnish: 30-kulmio (kolmekymmenkulmio)
• German: Dreißigeck (de)
• Hungarian: harmincszög (hu)
• Italian: triacontagono (it) m
• Japanese: 三十角形 (sanjūkakukei)
• Korean: 삼십각형 (samsipgakhyeong)
• Polish: 30-okąt m (trzydziestokąt)
• Russian: тридцатиугольник (ru) m (tridcatiugolʹnik)
• Ukrainian: тридцятикутник (trydcjatykutnyk)