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-126 than the basic pay equivalent to a member of the Senior Executive Service (). Active duty military officers are exempted from this definition. All agency officials with the statutory authority to procure aircraft must ensure that their policies and procedures comply with the requirements of OMB Circular A-76, and that those programs comply with the internal control requirements of OMB Circular A-123. Any material weaknesses must be reported to the President and the United States Congress. The development of policies and procedures must be done in cooperation with the GSA. If the agency does not have systems that conform to