Platonic solid (body) (English spelling)

...In that sense, it is interesting that the second yuga in India, Treta Yuga, is 1296,000 years old, and the unity mentioned by the Chinese scholar Shao Yong in the "Eternal Cycle Book" is 129,600 years old, which is a mysterious coincidence with the Platonic numbers, even though the numbers are different. It is also possible to speculate that the idea of ​​sacred numbers, which dates back to ancient Babylonia, has spread from East to West. In addition, there is a figure known as the "Platonic solid (body)" that is named after Plato. It is another name for the five regular polyhedrons (regular tetrahedron, regular cube, regular octahedron, regular dodecahedron, and regular icosahedron), and is said to have been discovered by the Pythagoreans, and the regular octahedron and icosahedron by Theaitētos (4th century BC). ...

*Some of the terminology that refers to "Platonic solid (body)" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…その意味で，インドにおける第2番目のユガであるトレーター･ユガが1296000年，中国北宋の学者邵雍（しようよう）が《皇極経世書》で述べる一元が129600年と，桁こそ違えプラトン数と不思議な暗合を示すことは興味深い事実であり，古代バビロニアにさかのぼる聖数観の東西への伝播も推測される。　なおプラトンの名が冠せられるものに〈プラトン立体Platonic solid(body)〉として知られる図形がある。五つの正多面体(正四面体，正六面体，正八面体，正十二面体，正二十面体)の別称で，《ティマイオス》に記述されていることによるが，正四，六，十二面体はピタゴラス学派の，正八，二十面体はテアイテトスTheaitētos(前4世紀)の発見によるという。…

※「Platonic solid（body）」について言及している用語解説の一部を掲載しています。

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