ナポレオンの定理
1. Napoleon's theoremIn mathematics, Napoleon's theorem states that if equilateral triangles are constructed on the sides of any triangle, either all outward, or all inward, the centres of those equilateral triangles themselves form an equilateral triangle. The triangle thus formed is called the Napoleon triangle (inner and outer). The difference in area of these two triangles equals the area of the original triangle. The theorem is often attributed to Napoleon Bonaparte (1769–1821).
Read “Napoleon's theorem” on English Wikipedia
Read “ナポレオンの定理” on Japanese Wikipedia
Read “Napoleon's theorem” on DBpedia
Read “Napoleon's theorem” on English Wikipedia
Read “ナポレオンの定理” on Japanese Wikipedia
Read “Napoleon's theorem” on DBpedia
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