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 19
16 THE ELEMENTS OF EUCLID. BOOK I. Join CD; then, in the case in which thevertex of each of the triangles is withoutthe other triangle, because AC is equal toAD, the angle ACU is equal (5. 1.) to theangle ADC: but the angle ACD is greaterthan the angle BCD; therefore the angleADC is gr^ater also…
Mathematics, Greek · Geometry · Trigonometry
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