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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク tetradecagon ： ウィキペディア英語版 tetradecagon In geometry, a tetradecagon (or tetrakaidecagon) is a 14-sided polygon or 14-gon. ==Regular tetradecagon== A ''regular tetradecagon'' has Schläfli symbol and can be constructed as a quasiregular truncated heptagon, t, which alternates two types of edges. The area of a regular tetradecagon of side length ''a'' is given by :$A\; =\; \backslash fraca^2\backslash cot\backslash frac\backslash simeq\; 15.3345a^2$ ===Construction=== As 14 = 2 × 7, a regular tetradecagon cannot be constructed using a compass and straightedge. However, it is constructible using neusis, or with an angle trisector. The animation below gives an approximation of about 0.05° on the center angle: File:Approximated_Tetradecagon_Inscribed_in_a_Circle.gif Construction of an approximated regular tetradecagon 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「tetradecagon」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.