English

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Etymology

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From di- +‎ angle.

Pronunciation

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Noun

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diangle (plural diangles)

  1. A digon or bigon; a two-sided shape.
    • 1853, “The Science of Medicine”, in The Journal of Psychological Medicine and Mental Pathology[1], page 241:
      The diangle ABCD indicates the entire duration of life, A and C being its commencement and its termination.
    • 1949, Arnold Sommerfeld, translated by Ernst G. Strauss, Partial Differential Equations in Physics[2], volume 1, Academic Press, page 319:
      Now the wedge 1,2 is mapped into the exterior of the circular diangle C,S1,1,O,2,S2,C; both regions are indicated by a shading of the boundary. We now seek the images of the reflected wedges.
    • 1969, Siberian Mathematical Journal[3], Kluwer/Plenum Publishers, page 107:
      Let B be a region of F bounded by a closed polygon comprised of segments of geodesics of surface F, and let hn be a sequence of nondegenerate diangles of region B whose sides are geodesics of region B and which converge to diangle hn.

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