Hyperbolic geometry or hypercycle, then the triangle has no circumscribed circle. As in spherical and elliptical geometry, in hyperbolic geometry if two triangles are similar, they must be congruent. A special polygon in hyperbolic geometry is the regular apeirogon, a uniform polygon with an infinite number of sides. In Euclidean geometry, the only way to construct such a polygon is to make the side lengths tend to zero and the apeirogon is indistinguishable from a circle, or make the interior angles tend to 180 degrees and the apeirogon approaches a straight line. However, in hyperbolic geometry, a regular apeirogon has sides of
OMB Circular A-130 of information in the operation of Federal programs. The initial release of the Circular provided a policy framework for information resources management (IRM) across the Federal government. Since the time of the Circular's first release in 1985, Congress has enacted several additional laws and OMB issued several guidance documents that related to information technology management in federal agencies. To account for these new laws and guidance, OMB has revised the Circular three times, in 1994, 1996, and 2000. A complete rewrite of the Circular to both update and to correct for known deficiencies has been considered since at least 2005,