Spherical geometry other geometric concepts are defined as in plane geometry, but with straight lines replaced by great circles. Thus, in spherical geometry, angles are defined between great circles, resulting in a spherical trigonometry that differs from ordinary trigonometry in many respects; for example, the sum of the interior angles of a triangle exceeds 180 degrees. Spherical geometry is "not" elliptic geometry, but is rather a "subset" of elliptic geometry. For example, it shares with that geometry the property that a line has no parallels through a given point. Contrast this with Euclidean geometry, in which a line has one parallel through
OMB Circular A-130 OMB Circular A-130 OMB Circular A-130, titled Management of Federal Information Resources, is one of many Government circulars produced by the United States Federal Government to establish policy for executive branch departments and agencies. Circular A-130 was first issued in December 1985 to meet information resource management requirements that were included in the Paperwork Reduction Act (PRA) of 1980. Specifically, the PRA assigned responsibility to the OMB Director to develop and maintain a comprehensive set of information resources management policies for use across the Federal government, and to promote the application of information technology to improve the use and dissemination