The elements of Euclid for the use of schools and colleges; comprising the first six books and portions of the eleventh and twelfth books; (1903)
Euclid, Todhunter, I. (Isaac), 1820-1884, ed. edt, Simson, Robert, 1687-1768, ed. edt · London; New York, Macmillan · leaf 62
and opposite angle of the exteriorangle EGB. The words interior^ exterior, and alternate are often abbreviated intoint., ext., and alt. T.L.E, D 50 EUCLIDS ELEMENTS. Proposition 27. Theorem. If a straight line^ meeting two other straight lines, make thealternate angles equal to one another, the two… … Proof. For if not, AB and CD, being produced, will meeteither towards B, D or towards A, C. Let them be pro-duced and meet towards B, D at the point G.Therefore GEF is a triangle, and its exterior angle AEF isgreater than the interior opposite angle EFG. [L 16. But the angle AEF also = the angle…
Euclid's Elements · Geometry · Mathematics, Greek
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
