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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 86

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 86
/ \ … 84 THE ELEMENTS OF EUCLID. BOOK IV. circle: but HAC is equal to the angle DEF, therefore also theangle ABC is equal to DEF; for the same reason, the angle ACBis equal to the angle DFE; therefore the remaining angle BAG isequal (32. I.) to the remaining angle EDF: wherefore the triangleABC is…

Mathematics, Greek · Geometry · Trigonometry

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