In mathematics, Casey's theorem, also known as the generalized Ptolemy's theorem, is a theorem in Euclidean geometry named after the Irish mathematician John Casey. In Wasan, it is said to have been discovered roughly thirty years before Casey’s publication.
In mathematics, Casey's theorem, also known as the generalized Ptolemy's theorem, is a theorem in Euclidean geometry named after the Irish mathematician John Casey. In Wasan, it is said to have been discovered roughly thirty years before Casey’s publication.
Source: Wikipedia "Casey's theorem" · CC BY-SA 4.0
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