 | John Gummere - Surveying - 1814 - 398 pages
...triangle be subtracted from 180°, the remainder will be the third angle. 6. If one angle of a triangle be subtracted from 180°, the remainder will be the sum of the other two angles. 7. In right angled triangles, if one of the acute angles be subtracted from 90% the remainder will... | |
 | Nautical astronomy - 1821 - 708 pages
...sum of all three angles is equal to two right angles or 180°, hence, by subtracting the given angle from 180°, the remainder will be the sum of the other two. In iny ri^ht angled triangle, the two acute angles taken together are just equal to a right angle :... | |
 | Olinthus Gregory - 1863 - 482 pages
...solution may be effected by means of props. 15 and 16 of the preceding section. Thus: take the given angle from 180°, the remainder will be the sum of the other two angles. Then say, — As the sum of the given sides, Is to their difference ; So is the tangent of half the... | |
 | William Findlay Shunk - Railroad engineering - 1880 - 362 pages
...are given, the solution may be effected by means of propositions 3 and 4. Thus, take the given angle from 180° ; the remainder will be the sum of the other two angles. Then, by proposition 3, — As the sum of the given sides is to their difference, So is the tangent... | |
 | Nathaniel Bowditch - Nautical astronomy - 1888 - 704 pages
...of all three angles is equal to two right angles, or 180° ; hence, by subtracting the given angle from 180°, the remainder will be the sum of the other two. In any right-angled triangle, the tvx> acute angles taken together are just equal to a right angle... | |
 | William Findlay Shunk - Railroad engineering - 1890 - 360 pages
...are given, the solution may be effected by means of propositions 3 and 4. Thus, take the given angle from 180°; the remainder will be the sum of the other two angles. Then, by proposition 3, — As the sum of the given sides is to their difference, So is the tangent... | |
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В = 36° 43' ..... log. 9.776598 sum. • CASE II. 5. Wben two sides and the included angle are given, the solution may be effected by means of propositions 3 and 4. Thus, take the given angle from 180° ; the remainder will be the sum of the other two... 