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  "body": "\n## Summary\n\nA net of a polyhedron is a flat polygon that folds up into the surface of the polyhedron.\nIt is made of the faces of the polyhedron, joined along some of their edges.\nIt arises by cutting the surface along a spanning tree of edges and unfolding it into the plane without overlap.\nNets are used to build paper models, and whether every convex polyhedron has one is the open [[Dürer's conjecture|PEDBPRSV9V]].\n\n## Explanations\n\n### L1 human\n\nCut a cardboard box along some of its edges and flatten it: the flat piece is a net of the box.\nThe cross shape made of six squares is a net of the cube, and the cube has $11$ different nets in all.\nThe cuts must be chosen so that the surface stays in one piece and lies flat without the faces overlapping.\n",
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