 | Charles Austin Hobbs - Geometry, Solid - 1921 - 216 pages
...circle is perpendicular to the given great circle. SPHERICAL POLYGONS AND PYRAMIDS A spherical polygon is a portion of the surface of a sphere bounded by three or more arcs of great circles; as A BCD. The bounding arcs are called the sides of the polygon, the... | |
 | James Atkins Bullard, Arthur Kiernan - Trigonometry - 1922 - 252 pages
...The angle of a lune is the angle formed by the semi-circumferences. 7. A spherical triangle is a part of the surface of a sphere bounded by three arcs of great circles. A trihedral angle, with vertex at the center of the sphere, is formed by the planes of the 148 great... | |
 | Lawrence Edminster Cutter - Geometry, Descriptive - 1923 - 266 pages
...sphere is the section made by a plane which passes through the center of the sphere. A spherical polygon is a portion of the surface of a sphere bounded by three or more arcs of great circles. The bounding arcs are the sides of the spherical polygon, and their... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 484 pages
...angle of the dihedral angle formed by their planes. SPHERICAL POLYGONS 733. DBF. A spherical polygon is a portion of the surface of a sphere bounded by three or more arcs of great circles. The arcs are the sides, their points of intersection are the vertices,... | |
 | Giora Hon, Bernard R. Goldstein - Science - 2008 - 337 pages
..."Triangle spherique est une partie de la surface de la sphere comprise par trois arcs de grands cercles." (A spherical triangle is a portion of the surface of a sphere enclosed by three arcs of great circles.) 73 Legendre [1794] 1817, 214-215: "L'egalite de ces triangles... | |
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A spherical triangle is a portion of the surface of a sphere, bounded by three arcs of great circles. 
