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In the same way every circle is corresponding to an equal sided triangle the 3-sphere is corresponding to an inserted tetraeder. The latitude of the corners of the tetraeder on the 3-sphere is calculated here giving the result arcsin(1/3), while arcsin(1/2) is derived for the 2-dimensional sphere.doi:10.24297/jap.v13i4.6052 fatcat:ogtffkm4hrhcvd43qtsoxu6jre