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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 56

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 56
equal to one another,it is a square, andwhat was requiredis now done: but ifthey are not equal,produce one of themBE to F, and makeEF equal to ED, andbisect BF in G; andfrom the centre G,at the distance GB, or GF, describe the semicircle BHF, andproduce DE to H, and join GH; therefore, because the…

Mathematics, Greek · Geometry · Trigonometry

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