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 24
(4. I.) to the base CF,and the triangle AEB to the trian-gle CEF, and the remaining angles,to the remaining angles, each toeach, to which the equal sides are opposite; wherefore the angleBAE is equal to the angle ECF; but the angle ECD is greaterthan the angle ECF; therefore the angle ACD is…
Mathematics, Greek · Geometry · Trigonometry
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