Acute triangle
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A triangle with three acute angles. An obtuse triangle. (English-Japanese Dictionary of Mathematical Terms (1889)) Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information |
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〘名〙 三つの内角が、いずれも鋭角である三角形。⇔鈍角三角形。〔数学ニ用ヰル辞ノ英和対訳字書（1889）〕
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![Urizura [town] - Urizura](/upload/images/67cb01713971c.webp)
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