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 229
32 PLANE TRIGONOMETRY. … which each of the trees can be seen, and find the distances fromit to the trees to be 300 and 250 yards, and the included angle43° 16; required the distance between the trees. Ans. 208.02 yards. CASE V. 58. To find the height of a vertical object standing upon an inclinedplane. Method.—Measure any…
Geometry · Plane trigonometry
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