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 24
e which it makes with the given lineis the complement of the required angle. Let LMN be the given plane and ABhe the given straight line. Through the point A, draw the line AC perpendicular to theplane LMN. Find the angle between AB and AC. Prob. VI 90°—This angle is the required angle. Problem… … 23 The angle between two planes is the angle between two lines,one in each plane, perpendicular to the line of intersection. Therefore, if a plane be passed through the two planes sothat it is at right angles to their line of intersection the two linesof intersection thus found are at right angles…
Geometry, Descriptive
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
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