Real Geometry

from the land of the Incas

• The Butterfly Theorem
• Triangles and squares
• The School of Athens

Interactive Tools

• JAVA Interactive Mathematics Miscellany and Puzzles - from the Geometry Page
• Explorelearning’s Gizo Catalog for College level Geometry

Other cool examples

• Geometry Web page
• Geometry in Action - huge page of links on real world applications of geometry