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Needs relation between the angular radius and Euclidean parameters, the curvature (in the sense of ] of the sphere), and the formula for areas (]) of two parts of the sphere. ] (]) 14:11, 20 April 2013 (UTC)
Needs relation between the angular radius and Euclidean parameters, the curvature (in the sense of ] of the sphere), and the formula for areas (]) of two parts of the sphere. ] (]) 14:11, 20 April 2013 (UTC)
== Name of surface ==
Does anyone know the name of the small surface? ] (]) 12:06, 11 February 2014 (UTC)
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