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" The sum of the angles of a spherical triangle is greater than two and less than six right angles ; that is, greater than 180° and less than 540°. (gr). If A'B'C' is the polar triangle of ABC... "
An Elementary Treatise on Plane and Solid Geometry - Page 138
by Benjamin Peirce - 1871 - 150 pages
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Primer of Celestial Navigation

John Favill - Nautical astronomy - 1940 - 258 pages
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Airplane Lofting

William Nelson - Aircraft drafting - 1941 - 168 pages
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Basic Mathematics: A Survey Course

Walter Wilson Hart - Mathematics - 1942 - 476 pages
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Spherical Trigonometry and Tables

William Anthony Granville - Spherical trigonometry - 1942 - 136 pages
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Mathematics Dictionary ...

Glenn James, Robert Clarke James - Mathematics - 1942 - 296 pages
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Plane and Spherical Trigonometry with Applications

William Le Roy Hart - Logarithms - 1943 - 368 pages
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Spherical Trigonometry After the Cesŕro Method

Joseph Désiré Hubert Donnay - Spherical trigonometry - 1945 - 104 pages
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Plane and Spherical Trigonometry, Volume 10

Henry Lewis Rietz, Roscoe Woods - Trigonometry - 1950 - 312 pages
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