The Online Books Page

Trisection of angle

See also what's at Wikipedia, your library, or elsewhere.

• Geometry -- Famous problems

• Angle trisection

• A Budget of Paradoxes (second edition, two volumes: Chicago et al: Open Court, 1915), by Augustus De Morgan, ed. by David Eugene Smith, contrib. by Sophia Elizabeth De Morgan
  • Volume I: multiple formats at archive.org
  • Volume II: multiple formats at archive.org
• A Budget of Paradoxes: Reprinted, With the Author's Additions, From the "Athenaeum" (London: Longmans, Green, and Co., 1872), by Augustus De Morgan, ed. by Sophia Elizabeth De Morgan (multiple formats at archive.org)

Items below (if any) are from related and broader terms.

• A Budget of Paradoxes (second edition, two volumes: Chicago et al: Open Court, 1915), by Augustus De Morgan, ed. by David Eugene Smith, contrib. by Sophia Elizabeth De Morgan
  • Volume I: multiple formats at archive.org
  • Volume II: multiple formats at archive.org
• A Budget of Paradoxes: Reprinted, With the Author's Additions, From the "Athenaeum" (London: Longmans, Green, and Co., 1872), by Augustus De Morgan, ed. by Sophia Elizabeth De Morgan (multiple formats at archive.org)
• Mathematical Essays and Recreations, by Hermann Schubert, trans. by Thomas J. McCormack (page images at Cornell)