Octahedraon in Cube
Cube and octahedron are dual in the following sense: the centers of the faces of a cube, if joined appropriately, form an octahedron; and vice versa.
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Drag the mouse to rotate the cube. Use the right button to remove and put back individual faces.
(Acknowledgement: I have learned most of Java details from the implementation by Meiko Rachimow.)
Copyright © 1996-2018 Alexander Bogomolny