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
ame ratio (7. 5.); therefore, asthe triangle BDE to the triangle ADE, so is the triangle CDE to thetriangle ADE; but as the triangle BDE to the triangle ADE, so is(1.6.) BD, to DA, because having the same altitude, viz. the perpen-dicular drawn from the point E to AB, they are to one another…
Euclid's Elements · Geometry · Trigonometry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
