A treatise on surveying and navigation: uniting the theoretical, the practical, and the educational features of these subjects (1852)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst · leaf 79
the two perpendiculars let fall on it from the two opposite corners, measured as below, required the content. AP = 110 links AQ= 745 AB = 1110 CP= 352 DQ— 595 Ans. 4 acres, 1 rood, 5.792 perches. Here we perceive a trapezoid and two right angled triangles.N. B. A chain is 4 rods, and contains 100… … MENSURATION. 75 Or thus, let fall two perpendiculars on the diagonal from the othertwo opposite angles ; then add these two perpendiculars together,and multiply that sum by the diagonal, taking half the product forthe area of the trapezium. Ex. 1. To find the area of the trapezium, whose diagonal…
Surveying · Navigation
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