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 208
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… … Fig. 17 Thus; 9.755.52)15.25 7.625 X 2 = 15.250 square feet Examples for Exercise 1. What is the area of a trapezoid, the longer of thetwo parallel sides being 130 feet, the shorter 100 feet,and the height 80 feet? Ans. 9200 square feet. 2. What is the area of a trapezoid, the longer of thetwo…
Mechanics · Arithmetic · Measurement
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