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 20
e it hasbeen demonstrated that the whole angle ABG is equal to thewhole ACF, the parts of which, the angles CBG, BCF, are alsoequal; the remaining angle ABC is therefore equal to the re-nnaining angle ACB, v/hicii are the angles at the base of thetriangle ABC: and it has also been proved that the… … PROP. VI. THEOR. IF two angles of a triangle be equal to one another,the sides also which subtend, or are opposite tOy theequal angles shall be equal to one another. OF EUCLID. 19 Let ABC be a triangle haviiicc the angle ABC equal to the Book I.angle ACB ; the side AB is also equal to the side AC.…
Euclid's Elements · Mathematics, Greek · Geometry
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