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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 79

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 79
therefore the remaining angle DBE is equal to the an-gle BCD in the alternate segment of the circle. Wherefore, if astraight line, Sec. Q. E. D. PROP. XXXIII. PROB. Upon a given straight line to describe a segment ofa circle, containing an angle equal to a given rectili-neal angle.^ Let AB be the… … BOOK III. THE ELEMENTS OF EUCLID. 77

Mathematics, Greek · Geometry · Trigonometry

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