Scribner's engineers' and mechanics' companion : comprising United States' weights and measures : mensuration of superficies and solids ... the mechanical powers ... steam and the steam engine (1848)
Scribner, J. M · New York : Huntington and Savage · leaf 39
53 -45* = 784, and =28 yds. Ans. 28 yds. Rule. OF TRAPEZIUMS AND TRAPEZOIDS.PROBLEM III. To find the Area of a Trapezium.-Divide the trapezium into triangles by drawing diagonal and the sum of the areas of these triangles will be the area of thetrapezium. 35 MENSURATION … Example.—What is the area of atrapezium whose diagonal, a c, is 42 feet,and the two perpendiculars, d e and b /,18 and 16 feet] 42x9 = 378) «., M r. Atio42X8=336 }-714^-/* Ans- PROBLEM IV. To find the Area of a Trapezoid. Rule.—Multiply the sum of the two parallel sides by the per-pendicular…
Mechanical engineering · Weights and measures
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