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 211
ual, and the circle described,with centre F and radius equal to any one of them, will passthrough the extremities of the other four;and it will touch AB, BC, CD, DE, EA, because the anglesat G, H, K, L, M are right angles. [HI. 16. Wherefore a circle GHKLM has been inscribed in the givenregular… … Construction. Bisect the angles BCD, CDE by the straightlines CF, DF, which meet in F. [I. 9. Join FB, FA, FE. Proof. It may be shewn, as in the preceding proposition,that the angles CBA, BAE, AED are bisected by the straightlines BF, AF, EF. Also because the z.BCD = the ^CDE,and that the ^FCD is…
Euclid's Elements · Geometry · Mathematics, Greek
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