My first acquaintance with tiling pentagons was from Martin Gardner’s “Mathematical Games” columns in Scientific American magazine, in July and in December 1975. Although every triangle and every quadrilateral can tile the plane (that is, fill the plane with congruent copies, without gaps or overlaps), only certain types of pentagons can tile the plane. Until Gardner’s article, it was believed that all such types were known; there were eight different types.
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- Martin Gardner July 1975. “On tessellating the plane with convex polygon tiles.” Mathematical Games, Scientific American, pp. 112–117.Google Scholar
- Martin Gardner 1988. “Tiling with Convex Polygons.” Time Travel and other Mathematical Bewilderments. W.H. Freeman & Co. pp. 174–175. [This reproduces the 1975 column of  and gives updates on the aftermath of the column.]Google Scholar
- Daniel Huson and Olaf Delgado Friedrichs 1992–95. RepTiles, computer software to produce k-isohedral tilings.Google Scholar
- Ivars Peterson 1990. “Paving the Plane.” Islands of Truth. W.H. Freeman & Co. pp. 83–86.Google Scholar
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