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 104
: 1-213162 16-337 = = area ADE Triangle ABB. DB = 6-97 DA- 6-02 AB - 2) 5-63 18-62 f9-31, log.- : 0-968950 < 2-34, log. = ■ 0-369216 3-29, log. = 0-517196 ,3-68, log. = 0-565848 Perimeter = 18-62 2) 2-421210 log. area = 1*21060516-241 = area ABD. Triangle BCB. DB= 6-97CD- 6-10BC = 5-11 2)18-18 •… … 47*722 = ABODE in sq. chains,or, 4*7722 in acres and decimals, which equals 4JL SB. 3JP. 2. Find the area of a fieldwhose sides and diagonals are asfollows: AB=4-17 ch.; BC = 11-93ch.; CD = 8-16 ch.; DE = 4-01ch.; EA = 4-97 ch.; EB = 3-98ch.; EC = 10-02 ch. Arts. 4A. IB. 1\P. 3. Find the area ofa…
Plane trigonometry · Surveying
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