[url=http://demonstrations.wolfram.com/author.html?author=Izidor+Hafner]Izidor Hafner[/url][url=http://demonstrations.wolfram.com/FoldingATriangularNetIntoABoat/]"Folding a Triangular Net into a Boat"[/url][br][url=http://demonstrations.wolfram.com/FoldingATriangularNetIntoABoat/]http://demonstrations.wolfram.com/FoldingATriangularNetIntoABoat/[/url][br][url=http://demonstrations.wolfram.com/]Wolfram Demonstrations Project[/url][br]Published: March 7 2011