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 (1834)
Euclid, Euclid, Simson, Robert, 1687-1768 · Philadelphia : Desilver & Thomas · leaf 281
r than the angles A, B toge-ther, therefore the angles C, D, E are not greater than the anglesA, B, E: but these last three are less than four right angles, ashas been demonstrated: wherefore also the angles C, D, E are to- 278 NOTES. BOOK XI. gether less than four right angles, and every two of… … H point F in the straight line FG a solid angle may be made equalto that which is contained by the three plane angles that are equalto the angles C, D, E: let this be made, and let the angle GFK,which is equal to E, be one of the three; and let KFL, GFL bethe other two which are equal to the angles…
Mathematics, Greek · Geometry · Trigonometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
