About this 3D model

This is an entry in the manipulative mathematics design challenge. It is a cone assembled from sections which illustrate the definitions of a circle, parabola, hyperbola and ellipse. The pieces fit together with two dowels. All can be printed without supports. This is accompanied by the following study modules: http://www.thingiverse.com/thing:183683 http://www.thingiverse.com/thing:183882 http://www.thingiverse.com/thing:185141