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 55
bles of these are equal: therefore the squares of AB,BC are equal to the square of AC, and twice the rectangle DB,BC: therefore the square of AC alone is less than the squares ofAB, BC by twice the rectangle DB, BC. A Lastly, Let the side AC be perpendicular to BC;then is BC the straight line…
Mathematics, Greek · Geometry · Trigonometry
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