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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 92

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 92
rences AB, BC, CD,DE, EA are equal to one another: and equal circumferences aresubtenij^d by equal (29. 3.) straight lines; therefore the fivestraight lines AB, BC, CD, DE, EA are equal to one another.Wherefore the pentagon ABCDE is equilateral. It is also equi-angular; because the circumference AB… … 90 THE ELEMENTS OF EUCLID. BOOK IV. .therefore the angle BAE is equal (27. 3.) to the angle AED: forthe sanie reason, each of the angles ABC, BCD, CDE is equal tothe angle BAE, or AED: therefore the pentagon ABCDE isequiangular^ and it has been shown that it is equilateral. Where-fore, in the given…

Mathematics, Greek · Geometry · Trigonometry

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