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 175
172 THE ELEMENTS OF EUCLID. BOOK XI. let the common section of it with those planes be BC, CD, DE,EF, FB; and because the solid angle at B is contained by threeplane angles CBA, ABF, FBC, of which any two are greater(20. 11.) than the third, the angles CBA, ABF, are greater thanthe angle FBC: for…
Mathematics, Greek · Geometry · Trigonometry
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