The normal elementary geometry : embracing a brief treatise on mensuration and trigonometry : designed for academies, seminaries, high schools, normal schools, and advanced classes in common schools (1884)
Brooks, Edward, 1831-1912 · Philadelphia : Christopher Sower Co. · leaf 230
se on theopposite side- of a river, I took the fol-lowing measurements: AB = 400; CAD = 56° 30,BAD = 42° 24; ABC= 44° 36,and DBC= 68° 50.Eequired the distance CD. Ans. 747.913. CASE VIII. 61. To find the distance between two inaccessible objects when no pointscan be found from which both objects… … 34 PLANE TRIGONOMETRY. accessible objects when no point can be found from which bothobjects can be seen, two objects Cand D are taken, 600 feet apart,from the former of which A can be seen, from the latter-B.. From.Cwe measure the distance CF, not in the direction DC, equal to600 feet, and from D a…
Geometry · Plane trigonometry
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