Brief synopsis of the course of lectures in descriptive geometry; as arranged for the first year Faculty of Applied Science and Engineering, University of Toronto. [By] J. Roy Cockburn (1922)
Cockburn, J. Roy · [Toronto] University of Toronto Engineering Society · leaf 27
traight lines parallel to the axes and thenfind the projections of these lines. In the case of a rectangular solid such as a cube or prism it isonly necessary to find the projections of the edges when theyare placed parallel to the assumed axes. In Fig. 29 let aB, aC, and aD be the orthographic… … If the plane ABC be revolved about BC to coincide with theplane of projection ^ will fall at ^1. As the angle BAiC is a right angle the arc BAiC must be asemi circle. The line DaAi is perpendicular to BCi. Prop. XVI1 AiB is the true length of the line AB. aB is its projected length. . . „ . , r l…
Geometry, Descriptive
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