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 203
E makes right an-e 10. def.gles with GH, that is, with any straight line drawn through E in 1the plane passing through AB, CD. In like manner, it may beproved, that FE makes right angles with every straight linewhich meets it in that plane. But a straight line is at right an-gles to a plane when it… … PROP. V. THEOR. IF three straight lines meet all in one point, and a See n.straight line stands at right angles to each of them inthat point; these three straight lines are in one andthe same plane. . Let the straight line AB stand at right angles to each of thestraight lines BC, BD, BE, in B the…
Euclid's Elements · Mathematics, Greek · Geometry
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