Devadoss, Satyan, Ziv Epstein, and Dmitriy Smirnov. "Visualizing Scissors Congruence." LIPIcs-Leibniz International Proceedings in Informatics. Vol. 51. Schloss Dagstuhl-Leibniz-Zentrum fuer Informatik, 2016.

Abstract

 Consider two simple polygons with equal area. The Wallace–Bolyai–Gerwien theorem states that these polygons are scissors congruent, that is, they can be dissected into finitely many congruent polygonal pieces. We present an interactive application that visualizes this constructive proof.