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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 67

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 67
* See Note. … 64 THE ELEMENTS OF EUCLID. BOOK III. Let the straight lines AB, CD, in the circle ABDC, be equalto one another: they are equally distant from the centre. Take E the centre of the circle ABDC, anci from it draw EF,EG perpendiculars to AB, CD^ then, because the straight line EF, passing through the…

Mathematics, Greek · Geometry · Trigonometry

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