Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 107
THEOREM XXIV. The circumferences of circles arc to each other as their diameters Let there be two circleswhose diameters are ALand FM: then will theircircumferences be to eachother as AL to FM For, suppose two similar polygons to be inscribed in thecircles: their perimeters will be to each other as…
Geometry · Plane trigonometry
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