M203 Summer Scool Notes
Welcome to Wilson Stothers' Cabri Geometry and Conics Pages
These pages were written to accompany a course in Geometry at the University of Glasgow,
but they are also relevant to the Geometry Block in the Open University M203 course.
There are also links to biographies of some famous geometers.
- The Geometry Page gives a purely geometric treatment of conics,
poles, polars and duality. The treatment of duality is thorough.
The later Theorems go beyond M203, so should be treated as enrichment material.
- The Algebra Page gives a purely algebraic treatment of the same topics.
The approach is rather different from M203 - it uses the matrix formulation extensively,
and treats Joachimsthal solely in homogeneous coordinates
Again it goes beyond M203.
- The Classical Theorems Pages illustrate eight theorems you will meet in M203,
and try to explain how they are related, especially by duality.
- The Conics Menu Page is for those with access to the Cabri Geometry package.
Information about Cabri, and a chance to download a demo version appears on the
If you want to discuss any aspect of the subject, feel free to
e-mail me at
Good luck in October!