**Mathematics Forum****For numerous links to Web pages related to geometry (including numerous links to dynamic software activities) see**http://atle.abc.se/~m9847/geometr.html**.**

- For information on Cinderella, see www.cinderella.de

- Inversions of circles and points in circles
- Inversion of a line
- Reflection of triangle in upper half plane model

- Mathematics Forum
- Jim Wilson'sn GSP lessons
- GSP lessons from the Geometry Center
- Chaim Goodman-Strauss' hyperbolic plane sketches

- Wingeom: a free windows-based software with a 3-D component.
- NonEuclid, a free interactive approach to hyperbolic geometry with the upper half plane and disks models.
- PoincaréDraw, a free DOS-based program for the Poincaré disk model of hyperbolic geometry.
- Geometry Explorer, exploring Euclidean, Hyperbolic, Analytic, and Turtle Geometries

David's Home Page || Books || Workshop