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 141
3235, which agrees nearlywith 1-513218, which is the log. of 32-60, the exact area. LEMMA. Tlirough a given point P, to draw a straight line ED to cuttwo straight lines AB, A O,given in position, but notparallel, so that the triangleADJE, thus formed, maybe of a given area. Through P draw FPI… … / / / / / • / s / / / / // §83.] SURVEYING, 131
Plane trigonometry · Surveying
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