# Pi-Like Ratios for Circular Lakes

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Everybody knows for a circle. But for a circular lake on the Earth, the ratios are not constant. In the case of a lake, let be the length of the shoreline, its area, and the distance along the surface from the center to the shore. Let the radius of the sphere be .

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Contributed by: Roger B. Kirchner (March 2011)

Open content licensed under CC BY-NC-SA

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