Noun
diangle (plural diangles)
- A digon or bigon; a two-sided shape.
1853, “The Science of Medicine”, in The Journal of Psychological Medicine and Mental Pathology, 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, 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, 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.