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The Royal Society: Science in the Making

Unpublished paper and letter, 'Problem. To trisect, or divide into three equal angles, a given rectilineal angle' by James Ryan

Reference number: AP/14/18

Date: 1830

Description

Ryan explains his method of trisecting a rectilineal angle through plane geometry, using numerous geometric examples to illustrate his methodology. Four figures included in the text. Preceded by a covering letter from Ryan to Davies Gilbert.

Subject: Mathematics

Reference number
AP/14/18
Earliest possible date
1830
Physical description
Ink on paper
Page extent
9 pages
Format
Manuscript

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Citation

Unpublished paper and letter, 'Problem. To trisect, or divide into three equal angles, a given rectilineal angle' by James Ryan, 1830, AP/14/18, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/ap_14_18/unpublished-paper-and-letter-problem-to-trisect-or-divide-into-three-equal-angles-a-given-rectilineal-angle-by-james-ryan, accessed on 19 March 2025

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https://makingscience.royalsociety.org/items/ap_14_18/unpublished-paper-and-letter-problem-to-trisect-or-divide-into-three-equal-angles-a-given-rectilineal-angle-by-james-ryan

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  • Archived Papers

    The 'Archived Papers' collection is comprised of original manuscript scientific papers and letters submitted to the Royal Society which remained unpublished or were abstracted in the journal 'Proceedings of the Royal Society' published from 1830 onwards.

    Dates: 1768 - 1989

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