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 35
al to BC ; if AD and BCmeet in 0, prove that the triangle AOB is isosceles. ABC is an isosceles triangle and D, E are points in the equal sidesAB, AC, such that AD and AE are equal; if BE and CD meet in F,prove that 6. BCF is an isosceles triangle. 7. AF bisects the angle BAC. 8. AF produced… … Construction. Take any point D in AB, and from ACcut oflf AE equal to AD; [I. 3. join DE, and on DE, on the side remote from A, describethe equilateral triangle DEF. : [I-1- Join AF.AF shall bisect the angle BAG. Proof. In the triangles DAF, EAF, AD is equal to AE, [^Cmstruction. because-^ and AF…
Euclid's Elements · Geometry · Mathematics, Greek
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