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 161
than the square of D,that is, than the given space. Therefore, &c. Q. E. D. Cor. 1. Because the polygons M and N differ from one anothermore than either of them differs from the circle, the difference be-tween each of them and the circle is less than the given space, viz.the square of D. And… … Cor. 2. The space B which is greater than any polygon that canbe inscribed in the circle A, and less than any polygon that can bedescribed about it, is equal to the circle A. If not jet them be une-qual; and first, let B exceed A by the space C. Then, because theEolygons described about the circle…
Euclid's Elements · Geometry · Trigonometry
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