A complete treatise on practical land-surveying, in seven parts; (1839)
Nesbit, A[nthony], 1778-1859. [from old catalog] · London, Longman, Orme, Browne, Green, and Longmans; [etc., etc.] · leaf 42
B E Draw the diagonal D B, and parallel to it draw C E, meetingA B produced in E. Join the points DE; so shall the triangleA D E be equal to the trapezium A B C D. Note.—This and the following Problem may be applied in finding theareas of trapeziums and irregular polygons by first reducingthemto… … Extend the side A E, both ways tit pleasure; and draw thediagonals C E, C A. Parallel to these diagonals draw the linesD F, and B G; join the points C F, G G; and G C F will bethe triangle required. Note.—Any irregular polygon of more than five sides, may be brought to atriangle of equal area, by…
Surveying
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