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 349
if any one of its angles be given, the rest are also given; andtherefore the triangle is given in species, without the considera-tion of the ratio of the perpendicular to the base, which in thiscase is given by prop. 50. But when ABC is not an isosceles triangle, take any straightline EF given in…
Mathematics, Greek · Geometry · Trigonometry
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