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 but as of October 2014, this rewrite has not yet occurred. A revised version was released on July 27, 2016. As expressed in the US Federal CIO Council's "Architecture Alignment and Assessment Guide" (2000), Circular A-130 can be thought of as a "one-stop shopping document for OMB policy and guidance on information technology management". A-130 includes specific guidelines that require The Federal Designated Approving Authority has specific requirements and responsibilities provided by this circular. It is required that this individual should be a management official, knowledgeable in the information and processes supported by the system. The individual should also know