The current version of the text was compiled in October, 2020, and it is absolutely free to read. If you adopt this text for a course or independent study, please let the author know (contact).
- GCT online, powered by PreTeXt
Download a pdf
You can download a pdf document suitable for screen viewing (with hyperlinks) or for printing:
- GCT for screens, pdf with hyperlinks
- GCT for printing, pdf without hyperlinks
If you want the convenience of holding a bound copy of the book in your hands, GCT is available for purchase through amazon.com here:
- Print on demand paperback (276 pages, $11, compiled in December, 2018 - it matches the current online version, except for these errata)
The GCT Guide is an online companion to the text, providing web-based computational tools (Sage cells) to help with calculations, as well as Geogebra activities to engage the reader with compass and ruler constructions used throughout the text.