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 347
s, placed in the same order. Take three plane angles. A, B, C, of which A is not lessthan either of the other two, and such, that A and B toge-ther are less than two right angles: and by problem 1 andits corollary, find a fourth angle D such, that any three what-ever of the angles A, B, C, D be… … -«nd also that any two of the angles C, D, E be greater than 2 X 546 NOTES. Book XI. the third : and because A and B together are less than two^^^f^*^ right angles, the double of A and B together is less than fourright angles : but A and B together are greater than the angleE ; wherefore the double…
Euclid's Elements · Mathematics, Greek · Geometry
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