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<rdf:Description rdf:about="https://catalogues.royalsociety.org:443/CalmView/record/catalog/AP/11/25" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/">
  <dc:title>Unpublished paper, 'On the nature and properties of straight lined angles' by J [John] Walsh</dc:title>
  <dc:description>Walsh discusses the work of Euclid on propositions relating to the sums of angles in triangles. He then seeks to show that the sum of the three angles of every plane triangle is equal to two right angles, independently of parallel lines. An earlier version of this paper is found at AP/11/23. The covering letter for this paper is found at AP/11/24.

Subject: Mathematics

Written by Walsh in Cork [Ireland] and addressed to T [Thomas] Young.</dc:description>
  <dc:date>20 January 1824</dc:date>
</rdf:Description>