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" OF PROTRACTING FIELDS. Without drawing parallel lines at the end of each side, a field may be protracted by the angles made by the several sides ; and the angle made between any two sides may be found by the following RULES. RULE 1. If the course or bearing... "
A System of Geometry and Trigonometry: With a Treatise on Surveying : in ... - Page 52
by Abel Flint - 1838 - 334 pages
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A Course of Mathematics: Containing the Principles of Plane ..., Volumes 1-3

Jeremiah Day - Geometry - 1839 - 434 pages
...any two contiguous sides make with each other, may be known by the following rules. 1. If one course is North and the other South, one East and the other West ; subtract the less from the greater. 2. If one is North and the other South, but both East or West...
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A Course of Mathematics: Containing the Principles of Plane Trigonometry ...

Jeremiah Day - Geometry - 1851 - 418 pages
...any two contiguous sides make with each other, may be known by the following rules. 1. If one course is North and the other South, one East and the other West ; subtract the less from the greater. 2. If one is North and the other South, but both East or West...
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Elements of Plane Trigonometry, Surveying and Navigation

William Smyth - Navigation - 1855 - 234 pages
...drawing meridian lines though the corners. The angles may be found by the following rules. 1°. If the bearing of one of the sides is north and the other south, one east and the other west, subtract the less course from the greater. 2°. If one is north and the other south, and both east...
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Elements of Plane and Spherical Trigonometry: With Their Applications to ...

Elias Loomis - Trigonometry - 1855 - 192 pages
...If one is north and the other south, but both east or west, subtract their sum from 180°. 4. If one is north and the other south, one east and the other west, subtract their difference from 180°. Thus the angle CAB is equal to NAB-NAC. The angle CAD is equal...
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Tables of Logarithms of Numbers and of Sines and Tangents for Every Ten ...

Elias Loomis - Logarithms - 1859 - 372 pages
...If one is north and the other south, but both east or west, subtract their sum from 180°. 4. If one is north and the other south, one east and the other west, subtract their difference from 180°. Thus the angle CAB is equal to NAB-NAC. The angle CAD is equal...
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