Grade (English spelling)
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A unit of angle. It is the same as a gon. One grad is 1/100th of a right angle. It was created during the French Revolution to advance the decimal metric system of units, as opposed to a degree, which is defined as 1/90th of a right angle. In Germany, it is called Neugrad, meaning new degree. The symbol g is used, and it is placed to the right of the number. 1 g = 0.9° = π/200 rad. [Ooi Misaho] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
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角度の単位。ゴンgonと同じである。1直角の1/100の大きさが1グラード。1直角の1/90で定義されている度に対し，十進法のメートル系単位を進める意味でフランス革命中に作られた。ドイツでは新しい度という意味でノイグラードNeugradという。記号にはgを用い，数字の右肩につける。1g＝0.9゜＝π/200radである。【大井 みさほ】
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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