Relationships In A Spherical Triangle Small 320×219 Medium 640×438 Large 1024×701 Download Tiff Original 2400×1643 | (198.7 KB) Description Illustration used, with the law of cosines, to find the relation between the three sides and an angle of a spherical triangle. Keywords analytic geometry, angle, cosine, sector, spherical triangles, trigonometric, trigonometry Galleries Spheres Source: George N. Bauer, PH.D. and W.E. Brooke, C.E., M.A. Plane And Spherical Trigonometry (Boston: D.C. Heath & Co., 1917) 129 Courtesy the private collection of Roy Winkelman