Hinged and Translational Dissection of Two Squares to One
The Demonstration gives hinged and translational dissection of two squares to one. Each dissection gives a physical realization of a proof of the Pythagorean theorem: .
G. N. Frederickson, Dissections: Plane & Fancy, New York: Cambridge University Press, 1997, 2002 pp. 4, 25, 28–31.