Course outlines

·            Nature of the plane sections of a central conocoid

·                 Axes of a central plane section

·                 Areas of plane sections

·                 Condition for the section to be a rectangular hyperbola

·                 Axes of non-central plane sections

·                 Parallel  plane sections

·                 Circular sections

·                 Umbilics

·                 Axes of plane sections of paraboloids

·                 Circular sections of paraboloids

·                 Generating lines of a hyperboloid one sheet

·                 Condition for a line to be a generator of the conicoid

·                 Properties of generating lines of hyperboloid of one sheet

·                 Projections of the generators of a hyperboloid on any principal plane 

·                 Perpendicular generators

·                 Properties of generating lines of   hyperbolic paraboloid.