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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 38

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 38
BOOK I. THE ELEMENTS OF EUCLID. 35 … between the same parallels BF, AD: the triangle ABC is equal tothe triangle DEF. Produce AD both ways to the points G, H, and through B drawBG parallel (31. 1.) to CA, and through F draw FH parallel toED: then each of thefigures GBCA, DEFH isa parallelogram; and theyare equal (36. 1.) to…

Mathematics, Greek · Geometry · Trigonometry

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