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 90
draw ^ DB at rightangles to AC, and join AB: first, let the angles ABD, BADbe equal to one another; then the straight line BD is equal^to DA, and therefore to DC; and because the three straightlines DA, DB, DC are all equal, D is the centre of the cir-cle *!: from the centre D, at the distance of… … micircle: but if the angles ABD, BAD are not equal to onee 23.1. another, at the point A, in the straight line AB, make « the angleBAE equal to the angle ABD, and produce BD, if necessary, toE, and join EC: and because the angle ABE is equal to the an-gle BAE, the straight line BE is equal e to EA…
Euclid's Elements · Mathematics, Greek · Geometry
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