A hand book of general instruction for mechanics, containing useful rules and memoranda for practical men (1907)
Smith, Franklin Elijah, 1872- · New York, D. Van Nostrand company · leaf 207
Fig. 14 Fig.15 To Find the Area of a Trapezoid Rule. Multiply half the sum of the two parallel sidesby the distance between them. Example. What is the area of the following trapezoid?(Fig. 16.) U = I J … Fig. 16 Here, the lines 8 and 6 being the parallel sides, wemultiply half their sum by the perpendicular distancebetween them, which is 3 inches. Thus: 8 _6 2)14 7 X 3 = 21 square inches. MENSURATION 195 Example. What is the area of a trapezoid whoseparallel sides are 5.5 feet and 9.75 feet, and…
Mechanics · Arithmetic · Measurement
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