Prodromus of a practical treatise on the mathematical arts: containing directions for surveying and engineering (1838)
Eaton, Amos, 1776-1842 · Troy, N.Y., E. Gates; New York, Robinson, Pratt & co., [etc., etc.] · leaf 191
m) a long squarewith opposite sides only equal. The line con-necting opposite corners is a diagonal. Rliomh, a figure with four opposite equal\ sides, not meeting at right angles. Superficies, having length and breadth withoutthickness. Solid, having length, breadth, and thickness.23 178 Right… … Ohtuse-angled triangle has one obtuse an-gle. Sec. 32. Acute-angled triangle has all three angles acute.If it has two equal sides, it should be called also Isos-celes triangle. If the three sides are equal, it is alsocalled Equilateral. Sec. 32. a c is the sine of the angle e. Sec. 33, article 3.
Surveying · Civil engineering
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