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 35
ore also the angle BHA is equal tothe angle BCA, that is, the exterior angle BHA of the triangleAHC is equal to its interior and opposite angle BCA; which isimpossible*; wherefore BC is not unequal to EF, that is, it isbl6.1.equal to it; and AB is equal to DE; therefore the two AB,BC are equal to… … 34 THE ELEMENTS Book I. PROP. XXVII. THEOR. IF a straight line falling upon two other straightlines makes the alternate angles equal to one another,these two straight lines shall be parallel.. Let the straight line EF, which falls upon the two straightlines AB, CD, make the alternate angles AEF,…
Euclid's Elements · Mathematics, Greek · Geometry
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