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 349
: letthis be made, and let the angle GFK, which is equal to E, beone of the three; and let KFL, GFL be the other two whichare equal to the angles, C, D, each to each. Thus there is asolid angle constituted at the point F contained by the four planeangles GFH, HFK, KFL, GFL v/hich are equal to the… … n. NOTES. 347 and, as in the preceding part, it may be demonsti-ated that Book XI.the three A, L-, M are less Vi^^v^**./ than four right angles, as alsothat the three C, D, M areless than four right angles.Make therefore a a solid angleat N contained by the threeplane angles ONP, PNQ,ONQ, which are…
Euclid's Elements · Mathematics, Greek · Geometry
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