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
Circular Quay end of Sydney Cove. Circular Quay increasingly became a tourist destination in its own right. Between 1971 and 1989, Colonial Mutual Life acquired land along Circular Quay for a large scale development. The initial, highly controversial design, was revised after the intervention of Prime Minister Paul Keating. In return for reducing the height of the building and adding a colonnade to facilitate public access, the development was permitted to extend further towards the foreshore, with the design finalised in 1992. In 1984, Lionel Todd (Sydney Opera House Stage 3 Architect), proposed his semi-circular quay concept to enhance views of the