Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 372
{FD - GEf = 679.5. BY CONSTRUCTION. Draw the line FD = 500 feet to any convenient scale. FromF draw the line FG, making the angle DFG = 60°. DrawDF = 588.5 ft., and from F draw FG parallel to FD. The dis-tances can now be taken from the scale. SEC. IV.] PRACTICAL APPLICATIONS. 365 405. Given the… … Fig. 192. From the point K draw to JL a line parallel to III; it willintersect JL 700—350 = 350 ft. from the point /. This line isthe perpendicular of a right-angled triangle, and we haveit = 350 tan 60°. Add to this the difference of elevation,which is the required depth. BY CONSTRUCTION. Draw the…
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