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 7
m^ … 6 Proposition IV Every plane which contains a straight line perpendicular to anotherplane is perpendicular to that plane. {Fig. 3.) Let the straight line AB be perpendicular to the plane M.Then any plane such as N which contains the line AB is perpen-dicular to the plane M. Let BC be the line of…
Geometry, Descriptive
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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