ブラーマグプタの定理
1. Brahmagupta theoremBrahmagupta's theorem is a result in geometry. It states that if a cyclic quadrilateral is orthodiagonal, then the perpendicular to a side from the point of intersection of the diagonals always bisects the opposite side. It is named after the Indian mathematician Brahmagupta. More specifically, let A, B, C and D be four points on a circle such that the lines AC and BD are perpendicular. Denote the intersection of AC and BD by M.
Read “Brahmagupta theorem” on English Wikipedia
Read “ブラーマグプタの定理” on Japanese Wikipedia
Read “Brahmagupta theorem” on DBpedia
Read “Brahmagupta theorem” on English Wikipedia
Read “ブラーマグプタの定理” on Japanese Wikipedia
Read “Brahmagupta theorem” on DBpedia
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