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 135
remaining angle CFD is equal to theremaining angle AGB (32. 1.): wherefore the triangle FCD is equirangular to the triangle GAB: Again, at the points G, B in the straightline GB make (23. 1.) the angle BGH equal to the angle DFE, andthe angle GBH equal toFDE: therefore the remaining angle FED…
Euclid's Elements · Geometry · Trigonometry
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