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 (1806)
Euclid, Simson, Robert, 1687-1768, Euclid. Elements. Book 11-12. English. 1806, Euclid. Data. English. 1806, Simson, Robert, 1687-1768. Notes, critical and geometrical. 1806, Simson, Robert, 1687-1768. Elements of plane and spherical trigonometry. 1806 · Philadelphia : Published by Mathew Cary, and sold by J. Conrad & Co., S.F. Bradford, Birch & Small, and Samuel Etheridge, printed by T. & G. Palmer ... · leaf 207
ng one another be paral-lel to two others that meet one another, and are notin the same plane with the first two, the first two andthe other two shall contain equal angles. Let the two straight lines AB, BC which meet one another beparallel to the two straight lines DE, EF that meet one another,and… … 206 THE ELEMENTS Book XI. fore AD is * both equal and parallel to BE. ^■—v—^ For the same reason CF is equal and pa- a 33.1, rallel to BE. Therefore AD and CF areeach of them equal and parallel to BE.But straight lines that are parallel to thesame straight line, and not in the same b 9.11. plane…
Euclid's Elements · Mathematics, Greek · Geometry
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