Tuesday,  October 28

Coordinates for "earth" - the sphere
Coordinates for the torus!

Activity for maps on Torus.
Locate P and Q on the map! give their coordinates.

Maps of the earth that use Projection:

What is projection for Flatland?

Center of projection/ perspective.
[ compare with similarity].
Correspondences:  Activity:Circle to Line:
How to see the Infinite using Projective geometry.
Circle to line and line to Circle!
Line to Line