Equilateral Pentagons Jorge Luis Mireles Jasso investigates these polygons and dissects various polyominos into them. Animations show cases of infinite solutions. http://www.geocities.com/jorgeluismireles/equilaterals/ Geocities.com~Site InfoWhoisTrace RouteRBL Check
Pentominoes Expository paper by R. Bhat and A. Fletcher. Covers pre-Golomb discoveries. the triplication problem and other aspects. http://www.andrews.edu/~calkins/math/pentos.htm Andrews.edu~Site InfoWhoisTrace RouteRBL Check
Six Squares Problem This Geometry Forum problem of the week asks for the number of different hexominoes, and for how many of them can be folded into a cube. http://mathforum.org/pow/solution22.html Mathforum.org~Site InfoWhoisTrace RouteRBL Check
Flexagons Conrad and Hartline's 1962 article on Flexagons. http://delta.cs.cinvestav.mx/~mcintosh/comun/flexagon/flexagon.html Cinvestav.mx~Site InfoWhoisTrace RouteRBL Check
Golygons Harry J. Smith's explains polyominoes with consecutive integer side lengths. http://www.geocities.com/hjsmithh/Golygons/ Geocities.com~Site InfoWhoisTrace RouteRBL Check