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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 15

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 15
be an equilateral triangle. Because the point A is the centre of theequal (15. Definition.) to AB; and because the point B is the centre of the circle ACE, BC is equal to BA: but it has been provedthat CA is equal to AB; therefore CA, CB are each of themequal to AB; but things which are equal to… … circle BCD, AC is straight line AB. Which was required to be done. PROP. II. PROB. From a given point to draw a straight line equal toa given straight line. Let A be the given point, and BC the given straight line; it isrequired to draw from the point A a straight line equal to BC. From the point A…

Mathematics, Greek · Geometry · Trigonometry

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