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 79
SlLEMENTS … sary, to E. and join EC: and because the angle ABE is equal to theangle BAE, the straight line BE is equal (6. I.) to EA; and becauseAD is equal to DC, and DE common to the triangles ADE, CD t, thetwo sides AD, DE are equal to the two CD, DE, each to each: and theangle ADE is equal to the angle (…
Euclid's Elements · Geometry · Trigonometry
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