. Agricultural engineering; a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Agricultural engineering. Fig. 19. where a and b are the two parallel sides, and h the perpendicular distance between them. Trapeziums (Fig. 19) are quadrilateral figures, no two of whose sides are parallel. A practical way to obtain the area of a field of this shape is to measure a diagonal dividing the field into two triangles whose areas may be calculated. It is to be noted that averaging opposite sides and taking their product w
. Agricultural engineering; a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Agricultural engineering. Fig. 19. where a and b are the two parallel sides, and h the perpendicular distance between them. Trapeziums (Fig. 19) are quadrilateral figures, no two of whose sides are parallel. A practical way to obtain the area of a field of this shape is to measure a diagonal dividing the field into two triangles whose areas may be calculated. It is to be noted that averaging opposite sides and taking their product will not give the area. Area abcd = area ACD+area abc. Figures With Many Sides. First Method: (Figs. 20 and 21.) A many- sided piece of land may be likewise divided in triangles and its area ob- tained in the way described for tra- pezium. The triangles may be formed about one of the corners of the figure, or about a point wholly within the. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Davidson, Jay Brownlee, 1880-1957. St. Paul, Minn. , Webb Pub. Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1919
