ヴィヴィアーニの定理
1. Viviani's theoremViviani's theorem, named after Vincenzo Viviani, states that the sum of the distances from any interior point to the sides of an equilateral triangle equals the length of the triangle's altitude.
Read “Viviani's theorem” on English Wikipedia
Read “ヴィヴィアーニの定理” on Japanese Wikipedia
Read “Viviani's theorem” on DBpedia
Read “Viviani's theorem” on English Wikipedia
Read “ヴィヴィアーニの定理” on Japanese Wikipedia
Read “Viviani's theorem” on DBpedia
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