 | United States. Army. Corps of Engineers - Military engineering - 1873 - 350 pages
...approximation to the spherical excess will be had by dividing the area by 7S-Slog mean radius of the eanh in yards = 6.8427917 If the three angles of a triangle...triangle may be computed as if they were rectilineal when one-third the excess of the sum of the three angles above 180° is deducted from each of the three... | |
 | 1876 - 172 pages
...dividing the area by 75.5 miles. If the three angles are assumed to have been equally well measured, the previous determination of the spherical excess...the relative accuracy of the observations), for the length of the sides of a spherical triangle may be computed as if they were rectilinear when one third... | |
 | Anthony Charles Cooke - 1879 - 438 pages
...excess will be had by dividing the area by 75'5. Log. mean radius of the earth in yards = 6'8427917. If the three angles of a triangle are assumed to have...for the calculation of the sides, though it will be requiroJ for estimating the relative value of the observations. For the sides ol », pherical trianfJe... | |
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in yards = 6.8427917. If the three angles of a triangle are assumed to have been equally well determined, the previous determination of the spherical excess is not necessary for the calculation of the sides, though it will be required for estimating the... 