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 142
/ / / / / • / s / / / / // §83.] SURVEYING, 131 … Ku ply KD=PH; then through D and P draw DE, and the problemwill be solved. For, supposing Fis-2- M to be the inter-section of DE andIH, it is evident,because of theparallel lines, thatthe three trianglesPHM, PFE, andMDI are equian-gular. Therefore, the area of all equiangular triangles being in the…
Plane trigonometry · Surveying
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