Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 196
re known; hence, the areaof PDC may be computed. In like manner, the areas of all thetriangles about P au/1 Pl may be deter-mined. Area ABCD = PAD + PDC + PCS+ PBA. Also, Area ABCD = PAD + PDC+PCB+ PBA. Problem 5. To determine the area of a field from two exteriorstations. d Let ABCD (Fig. 18)…
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