Plane trigonometry, and its application to mensuration and land surveying. Accompanied with all the necessary logarithmic and trigonometric tables (1852)
Perkins, George R. (George Roberts), 1812-1876 · New York, D. Appleton · leaf 147
y determined. 136 SURVEYING. [CHAP. X. CASE II. When the point is without the field, as at P. Let ABCDFGH be the samefield as in Case I. Produce the sides BC and FDuntil they meet at K. Through P draw PME par-allel to FK, and make the par-allelogram MNRK equal to thearea of the triangle DCK addedto… … CALCULATION. As an example, suppose the bearing of BP to be !N. 55° 30E., and equal to 5*35 chains, and that the area to be cut off is2 acres. Triangle BPC gives BC = 8-12 ; BP = 5-35 ; and the contained angle 18°.8-12 + 5-35 = 1347; 8-12-5-35 - 2*77 ; J (180°-18°) - 81°.13-47 : 2-77 : : tang. 81°…
Plane trigonometry · Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-468-290.webp)
