| Thomas Dick - Astronomy - 1838 - 444 pages
...O will be equal to sixty degrees. Hence, if any two angles of a triangle be known, the third may be **found by subtracting the sum of the two known angles from 180** degrees, the remainder will be the number of degrees in the third angle. All the triangles have their... | |
| Thomas Dick - Astronomy - 1838 - 426 pages
...O will be equal to sixty degrees. Hence, if any two angles of a triangle be known, the third may be **found by subtracting the sum of the two known angles from 180** degrees, the remainder will be the number of degrees in the third angle. AH the triangles have their... | |
| Dionysius Lardner - Curves, Plane - 1840 - 386 pages
...other two, it must be acute. (56.) If two angles of a triangle be known, the remaining angle may be **found by subtracting the sum of the two known angles from 180°.** (57.) If two triangles have two angles in the one equal to two angles in the other, the remaining angles... | |
| Benjamin Peirce - Plane trigonometry - 1845 - 498 pages
...В ; whence sin. В = -.— — . (134) Secondly. The third angle is found by subtracting the sura **of the two known angles from 180°. Thirdly. The third...proportion. As the sine of the given angle is to the sine of** the angle opposite the required side, so is the side opposite the given angle to the required side.... | |
| Charles Davies, William Guy Peck - Electronic book - 1855 - 592 pages
...cases may arise in solving oblique triangles : 1. When two angles and a side are trinen. In this case, **the third angle is found by subtracting the sum of the two** given angles from 180°. The sides may then be found by for- ˇ ínula (1). 2 When tico sides and an... | |
| Royal geographical society - 1883
...For the rest we have : — . A TABLE I. In oblique-angled triangles, if two of the angles are known, **the third angle is found by subtracting the sum of the two** from 180°; for the rest we have : — Case. Given. Required. Solution. ' i Hyp. AC Angles . . BaseCB..... | |
| Edwin Pliny Seaver - Trigonometry - 1889 - 306 pages
...one side and two angles of a triangle to find the other parts. Let Ъ, A, and Б be the given parts. **The third angle is found by subtracting the sum of the two** given angles from 180°. С = 180° — (A + Б). To find the side c, draw a perpendicular С R to... | |
| Arthur Thomas Simmons - Geomorphology - 1897 - 516 pages
...are known, the third or B FIG. 198.— An instrument to illustrate Parallax. remaining angle can be **found by subtracting the sum of the two known angles from 180°.** In the preceding experiments two angles (A and B) of a triangle were measured in the case of each object... | |
| Mechanical drawing - 1904
...explanation. By the use of this principle, when two angles are known, the value of the third can readily be **found by subtracting the sum of the two known angles from 180.** Now for a practical problem : A bevel gear io pitch dia. 2 diametral pitch meshes with another gear... | |
| E. A. Selley - Astronomy - 1907 - 456 pages
...degrees in the known angle from 90. Hence, if any two angles of a triangle are known, the third may be **found by subtracting the sum of the two known angles from 180°,** the remainder being the number of degrees in the third angle. However, this is more of the mathematical... | |
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