Protractor on the dial from 180°, as the dial is graduated from opposite zero marks to 90° each way. Since the spaces, both on the main scale and the Vernier scale, are numbered both to the right and to the left from zero, any angle can be measured. The readings can be taken either to the right or to the left, according to the direction in which the zero on the main scale is moved. Reading the Vernier scale: The bevel protractor Vernier scale may have graduations of 5′ (minutes) or 1/12°. Each space on the Vernier scale is 5′ less
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