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 37
e DB. [I. 4. Wherefore the given straight line AB is divided into two equal parts at the point D. [q.e.f. EXERCISE. In the above figure prove that every point in the line CD, or CDproduced, is equally distant from A and B, BOOK I. 11. 26 Proposition 11. Problem. To draw a straight line at right… … Construction. Take any point D in AC, and make CEequal to CD. [I. 3. On DE describe the equilateral triangle DFE, [le 1. and join CF.The straight line CF shall be the line required Proof. In the triangles DCF, ECF, (DC is equal to CE, [Construction. and CF is common to both,and the base DF is equal…
Euclid's Elements · Geometry · Mathematics, Greek
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