オイラーの定理 (平面幾何学)
1. Euler's theorem in geometryIn geometry, Euler's theorem, named after Leonhard Euler, states that the distance d between the circumcentre and incentre of a triangle can be expressed as where R and r denote the circumradius and inradius respectively (the radii of the above two circles). From the theorem follows the Euler inequality:
Read “Euler's theorem in geometry” on English Wikipedia
Read “オイラーの定理 (平面幾何学)” on Japanese Wikipedia
Read “Euler's theorem in geometry” on DBpedia
Read “Euler's theorem in geometry” on English Wikipedia
Read “オイラーの定理 (平面幾何学)” on Japanese Wikipedia
Read “Euler's theorem in geometry” on DBpedia
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