| Eugene Randolph Smith - Geometry, Solid - 1918 - 232 pages
...a spherical triangle is always less than the sum of the non-adjacent interior angles, and therefore **the sum of the angles of a spherical triangle is greater than** a straight angle : If the exterior angle in the last figure is equal to, or less than, the interior... | |
| Arvid Reuterdahl - Minnesota - 1920 - 314 pages
...pangeometry can be restated in terms of Euclidean geometry. From ordinary Euclidean geometry we know that **the sum of the angles of a spherical triangle is greater than two** and less than six right angles. Riemann's geometry, therefore, is little more than a new version of... | |
| Charles Austin Hobbs - Geometry, Solid - 1921 - 216 pages
...(?) By producing BC to meet A'B' and AT' it can be proved that Z A' °? 180° - BC. Proposition 330 **Theorem The sum of the angles of a spherical triangle is greater than two,** and less than six, right angles. Hypothesis. Let A, B, and C denote the numerical measures of the A... | |
| United States. Office of Education - 1921 - 1268 pages
...sum of the other two sides. 48. The sum of the sides of a spherical polygon is less than 300°. 49. **The sum of the angles of a spherical triangle is greater than** 180° and less than 540°. 50. There can not be more than five regular polyhedrons. 51. The locus of... | |
| Education - 1921 - 1198 pages
...sum of the other two sides. 48. The sum of the sides of a spherical polygon is less than 360°. 49. **The sum of the angles of a spherical triangle is greater than** 180° and less than 540°. 50. There can not be more than five regular polyhedrons. 51. The locus of... | |
| National Committee on Mathematical Requirements - Mathematics - 1922 - 73 pages
...sum of 'the other two sides. 48. The sum of the sides of a spherical polygon is less than 360°. 49. **The sum of the angles of a spherical triangle is greater than** 180° and less tha'n 540°. 50. There can not be more than five regular polyhedrons. 51. The locus... | |
| Herbert Edwin Hawkes, William Arthur Luby, Frank Charles Touton - Geometry, Solid - 1922 - 216 pages
...corresponding face angles are equal and the trihedrals are either symmetric or congruent. Theorem 19 661. **The sum of the angles of a spherical triangle is greater than** 180° and less than o40°. Given the spherical triangle ABC. To prove that 180° <^A + ZB + ^C< 540°... | |
| James Atkins Bullard, Arthur Kiernan - Trigonometry - 1922 - 252 pages
...etc. IV. The sum of the sides of a spherical triangle is less than 360°; that is, a+6+c<360°. V. **The sum of the angles of a spherical triangle is greater than** 180° and less than 540°; that is, 180°<Л + ß+C<540°. VI. In any spherical triangle the order... | |
| Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 484 pages
...ZB = 80°, prove that Z C>10°. HINT. Construct the polar A A'B'C'. PROPOSITION XVII. THEOREM 754. **The sum of the angles of a spherical triangle is greater than two** and less than six right angles. Given ABC, a spherical triangle. To prove ZA + ZB + Z C> 180°, and... | |
| Lawrence Edminster Cutter - Geometry, Descriptive - 1923 - 266 pages
...spherical polygon of three sides. THEOREMS The sum of the sides of a spherical polygon is less than 360°. **The sum of the angles of a spherical triangle is greater than** 180° and less than 540°. SOLUTION OF TRIHEDRAL ANGLES In a trihedral angle there are three face angles... | |
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