Find the Opposite Face
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A net for a polyhedron folds up to form a closed solid. The nets for four polyhedra are labeled. Find the face opposite the given face in the 3D solid.
Contributed by: Izidor Hafner (April 2013)
Open content licensed under CC BY-NC-SA
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"Find the Opposite Face"
http://demonstrations.wolfram.com/FindTheOppositeFace/
Wolfram Demonstrations Project
Published: April 18 2013