On the proof of Ptolemy's lemma

DOI10.4171/EM/328zbMath1372.51012WikidataQ124807090 ScholiaQ124807090MaRDI QIDQ2012011

Gerhard Wanner, Djura Paunić

Publication date: 27 July 2017

Published in: Elemente der Mathematik (Search for Journal in Brave)

zbMATH Keywords

cyclic quadrilateralsPtolemy's lemma

Mathematics Subject Classification ID

Elementary problems in Euclidean geometries (51M04)

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