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#casey's_theorem

Casey's theorem

On four non-intersecting circles that lie inside a bigger circle and tangent to it

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.

Sun 22nd

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Casey's theorem Feuerbach point John Casey (mathematician) Ptolemy's theorem Thébault's theorem List of theorems List of circle topics Pythagorean theorem Bitangent List of lay Catholic scientists
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