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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 180

An illustration from 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, leaf 180
N … BOOK XI. THE ELEMENTS OF EUCLID. 177 PROP. A. THEOR. If each of two solid angles be contained by three planeangles equal to one another, each to each; the planes inwhich the equal angles are, have the same inclination toone another.^ Let there be two solid angles at the points A, B; and let the…

Mathematics, Greek · Geometry · Trigonometry

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