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#Mon Aug 09 12:12:16 CEST 2010
Text__idQM4KOeEd-WfYQ0GneCwQ_text=<p>A flat surface can be conceived of as a two-dimensional model of three-dimensional Euclidean spaces. In Euclidean spaces the sum of the angles in a triangle equals 180 degrees. The circumference of a growing circle increases at exactly the same rate as its radius.</p>
Text__idQM4KOeEd-WfYQ0GneCwQ_title=Euclidean Surface