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
Circular Quay ferry wharf Circular Quay ferry wharf Circular Quay ferry wharf is a complex of wharves at Circular Quay, on Sydney Cove, that serves as the hub for the Sydney Harbour ferry network. The Circular Quay ferry wharf complex consists of five double sided wharves at 90 degrees to the shoreline, numbered 2 to 6. Wharves 3 to 5 are used exclusively by Sydney Ferries, wharf 2 west is used by Sydney Ferries, wharf 2 east is used by Manly Fast Ferries by while wharf 6 is used by other operators including Captain Cook Cruises. Each wharf has ticket selling facilities on both