Elements of Descriptive Geometry

auxiliary axes axis base called centre circle circular coincide common section cone consequently Construction cube curve curve of intersection cuts cylinder describe determine diameter dihedral angles distance draw draw a line drawn edge elevation ellipse equal evident faces figure find the projections fixed four given line given point ground line Hence horizontal plane horizontal projection horizontal trace inclined join length limiting meet meridian method normal parallel passing perpendicular plane containing plane LMN plane of projection plane parallel plane required point of intersection position Prob PROBLEM Proof pyramid rabatment radius regular required to find respectively revolving right angles scale side similar solid solution sphere square straight line taken tangent plane Theor THEOREM tion touch triangle turned vertex vertical plane vertical projection vertical trace