Models
| Cones for conic sections (Menecmo-Euclid theory) | Cones for conic sections (Apollonius theory) |
| Models showing Dandelin theorem | Models showing an Apollonius theorem |
| Dürer perspectograph |
The genesis of geometric
transformations in the 3d space
| Homothety | Affinity |
| Translation | Perspectivity |