Greg Frederickson - my homepage.
Dissections: Plane & Fancy - an introduction to my classic book on geometric dissections.
Hinged Dissections: Swinging & Twisting - an introduction to my super book on hinged dissections.
Piano-hinged Dissections: Time to Fold - an introduction to my new book on folding dissections.
Geometric dissections on the web - links to animations, puzzles, examples, paradoxes, and commercial offerings.