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 80
angle BGC, and the angle at D half the angle EHF: therefore theangl .«t A is equal to the angle at D. Wherefore, in equal circles,&c. Q.E. D. PROP. XXVIII. THEOR. In equal circles, equal straight lines cut off equal arches,the greater equal to the greater, and the less to the less.Let ABC, DEF…
Euclid's Elements · Geometry · Trigonometry
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