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 344
erefore b 4. 1. ■ the base EB is equal bto the base FB; in thesame manner EA is e-qual to FA, and EC toFC: and in the trianglesEBA, FBA, EB, BAaic equal to FB, BA,and the base EA is e-qual to the base FA;wherefore the angle c 8. 1. EBA is equalc to the ^ anele FBA, and the tri- „ .^--^ I ■ . ~ C… … NOTES. 343 the triangle FBC, and the triangle EAC to FAC ; therefore Book XI.there are two solid figures, each of which is contained by six v.^v->»/triangles, one of them by three tri^^ngles, the common vertexof which is the pomt G, and their bases the straight lines AB,BC, CA, and by three…
Euclid's Elements · Mathematics, Greek · Geometry
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-273-178.webp)
