Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 122
produced, be cut proportionally in the points D, E, that is, so thatBD be to DA, as CE to E A, and join DE ; DE is parallel to BC. The same construction being made,because as BD to DA, so is CEto EA; and as BD to DA, so is the triangle BDE to the triangle ADE(1. 6.); and as CE to EA, so is the…
Euclid's Elements · Geometry · Trigonometry
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