The elements of Euclid : viz, the first six books, together with the eleventh and twelfth : the errors, by which Theon, or others, have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also, The book of Euclid's data, in like manner corrected (1834)
Euclid, Euclid, Simson, Robert, 1687-1768 · Philadelphia : Desilver & Thomas · leaf 17
ite; viz. the angle ACF tothe angle ABG, and the angle AFC to theangle AGB; and because the whole AF isequal to the whole AG, of which the partsAB, AC, are equal: the remainder BFshall be equal (S. Ax.) to the remainder j^CG; and FC was proved to be equal toGB; therefore the two sides BF, FC are… … BOOK I. THE ELEMENTS OF EUCLID. 15 gles, each to each, to which the equal sides, are opposite; there-fore the angle FBC is equal to the angle GCB, and the angle BCFto the angle CBG; and, since it has been demonstrated, that thewhole angle ABG is equal to the whole ACF, the parts of which,the angles…
Mathematics, Greek · Geometry · Trigonometry
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