These geometrical shapes are designed for educational purposes.

It is cut in 4 different ways in order to obtain the circle, ellipse, hyperbole and parabola. The pieces were separately printed and they stick together with magnets for an easier explanation.
It is also sliced to see the proportions and sections. A hole goes through all the pieces in order to pass a string and keep the pieces together to form the pyramid.cones sketch

Cono - pezzi 3D printed pyramid