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difference of small circl to great circle — Preceding unsigned comment added by 124.6.181.171 (talk) 08:50, 16 June 2011 (UTC)
Incomplete
Needs relation between the angular radius and Euclidean parameters, the curvature (in the sense of Riemannian geometry of the sphere), and the formula for areas (solid angle) of two parts of the sphere. Incnis Mrsi (talk) 14:11, 20 April 2013 (UTC)
Name of surface
Does anyone know the name of the small surface? Soerfm (talk) 12:06, 11 February 2014 (UTC)
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