[The image above illustrates Thales Theorem, the very first theorem ever proved. It says that any angle inscribed in a semi-circle will be a right angle.]
The revised course now contains a complete digital copy of the textbook, Geometry: A Guided Inquiry, by G. D. Chakerian, Calvin D. Crabill, and Sherman K. Stein, an introductory video for each chapter, a complete pdf solution guide to all problems in the Central and Project sections of the text, a video solution guide to the Review sections, commentary, extensions, and over 200 dynamic demonstrations, using GeoGebra (Classic Edition, Ver 5). GeoGebra is available (free download) from the website GeoGebra.org.
All Math Without Borders courses are available for immediate digital download.