We saw in the previous tutorial that projective geometry arose out of perspective painting by the addition of new elements, first noticed by Renaissance painters, where parallel lines and planes meet.

The addition of these new elements in projective geometry (PG) had unexpected and far-reaching consequences. To simplify the discussion, we focus now on 2D projective geometry, the projective plane $P(\mathbb{R}^2)$. It arises from the euclidean plane $\mathbf{E}^2$ by adding an ideal line along with all its points, the ideal points of the projective plane.

TODO List #

• Figure out how to organize menus
• Figure out whether it’s possible to have any GO templates in md files since I’m using unsafe = true
• Figure out how to get rid of borders on geogebra demos
• Investigate how to add GUI to ganja demos
• Look into font size and spacing – it seems small and spread out
• Migrate the ganja notebooks into pgbook
• Figure out how to pass parameters to the ganja scripts
• Why do the floated figures have so much space below them?