Trisection of an angle - Trisection of an angle

Japanese: 角の3等分問題 - かくのさんとうぶんもんだい
Trisection of an angle - Trisection of an angle

…The construction of plane figures using only set squares and compasses, which was the subject of the best-known problem of ancient Greek geometers, is the problem of dividing a given angle into three parts (the angle trisection problem), (2) constructing a cube with twice the volume of a given cube (the cube doubling problem), and (3) constructing a square with the same area as a given circle (the circle square problem). These problems were studied by Greek geometers from around the 5th and 6th centuries BC, and attempts to solve them were relentless, but they remained unsolved and were passed down to posterity as the three great problems of Greek mathematics. …

*Some of the terminology explanations that refer to the "angle trisection problem" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…古代ギリシアの幾何学者によって扱われた使用器具を定規とコンパスに限定する平面図形の作図がもっともよく知られているが,これに関する次の三つの問題がとくに著名である。(1)与えられた角を3等分すること(角の3等分問題),(2)与えられた立方体の体積の2倍の体積をもつような立方体を作ること(立方体倍積問題),(3)与えられた円と等しい面積をもつ正方形を作ること(円積問題)。これらの問題は前5,6世紀ごろからギリシアの幾何学者によって研究され,執拗(しつよう)にその解法が求められたのであるが,解決をみず,ギリシア数学の三大問題として後世に残された。…

※「角の3等分問題」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。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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