Nets of 3D figures

Nets are a little like folding flat paper to cover a 3D object. Everywhere the paper touches is part of the surface of the object.

Intro to nets of polyhedra

Nets of polyhedra

Surface area using a net: triangular prism

Surface area using a net: rectangular prism

Surface area of a box (cuboid)

Surface area of a box using nets

Surface area using nets