Cylindrical surface - Enchumen

Japanese: 円柱面 - えんちゅうめん
Cylindrical surface - Enchumen

...The lateral area of ​​a right circular cylinder with a base radius of r and height of h is 2π rh , and the volume of both a right and oblique circular cylinder is π r 2 h . When the generating lines of a right circular cylinder are extended infinitely on both sides, the curved surface described by these lines is called a cylindrical surface. This is the figure that is created when one of two parallel lines is rotated around the other one once. …

*Some of the terminology explanations that refer to "cylindrical surface" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…底面の半径がrで,高さがhである直円柱の側面積は2πrh,体積は直・斜円柱ともπr2hである。直円柱において,その各母線を両側に無限に延長するとき,これらの直線によって描かれる曲面を円柱面という。これは平行な2直線の一方を軸として,他方を1回転させたときに生ずる図形である。…

※「円柱面」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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