A net is a two-dimensional "pattern" that can be folded to form a three-dimensional solid. It is a "pattern" of the layout of a three-dimensional solid showing each of its faces. A solid may have more than one net.
Nets can be very useful when finding surface area.
These are possible "nets" for the Platonic Solids.
Click on the net to open a .pdf file with a larger template.
tetrahedron
cube
octahedron
dodecahedron
icosahedron
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