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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 54

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 54
containing that angle, by twice the rectangle con-tained by either of these sides, and the straight lineintercepted between the perpendicular let fall upon itfrom the opposite angle, and the acute angle.* Let ABC be any triangle, and the angle at B one of its acuteangles, and upon BC one of the… … 52 THE ELEMENTS OF EUCLID. BOOK II,

Mathematics, Greek · Geometry · Trigonometry

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