A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 551
III. — In every completequadeilateeal the middle points of itsV three diagonals lie in the same straight line.A E B C D F is the quadrilateral, and L M X the middle points of its threediagonals. From A and D draw parallels to B 0, and from B and C drawparallels to A D. The triangle EDO being cut by… … THE COMPLETE QUADRILATERAL. 537 Fig. 587.
Surveying
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