I taught a subject called "Descriptive Geometry and Workshop Drawings" which has Myriad applications. ie Deriving Involute curves ,(Gear Teeth) Archimedean spirals Reflective Mirrors, Parabola's Blueprints for Making EVERYTHING Profiling intersecting solids,(Shapes) Various Projections, Isometric Axonometric Plan and elevations. for houses .Machine drawing Protocol.. From Architects to Engineers and space orbital projections . Mapping, Navigation On and ON. Nothing gets made without it. At the Higher end it gets very Mathematical and Complex. . Nev