A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 135
= DC ; and finally,that DC = EF. Hence we have GA = BC = ED = FG = AB = DC = EF ; andas the polygon is equiangular by hypothesis, it is regular {117)- Q- e. d. 260, ScH.—It is easy to see that the above argu-ment would fail in the case of a polygon of an evennumber of sides, because, in going… … Fig. 190.
Geometry · Trigonometry
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