Elements of geometry : containing the first six books of Euclid, with a supplement on the quadrature of the circle, and the geometry of solids : to which are added, Elements of plane and spherical geometry (1826)
Playfair, John, 1748-1819, Euclid · Philadelphia : Marot & Walter · leaf 162
OF GEOMETRY. BOOK I. l«i Let AB he the side of any equilateral polygon inscribed in the cir-cle A.BC; bisect the eireumference AB in G, and throuajh G drawEGF touching the circle, and meeting DA produced in E, and DB … -o produced in F; EF will be the side of an equilateral polygon de-scribed about tiie circle ABC (3. 1. Sup.). In AC produced takeAK equal to half the perimeter of the polygon whose side is AB;and AL equal to half the perimeter of the polygon whose side is EF.Then AK. will be less, and AL greater…
Euclid's Elements · Geometry · Trigonometry
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