This activity is also part of one or more other Books. Modifications will be visible in all these Books. Do you want to modify the original activity or create your own copy for this Book instead?
This activity was created by '{$1}'. Do you want to modify the original activity or create your own copy instead?
This activity was created by '{$1}' and you lack the permission to edit it. Do you want to create your own copy instead and add it to the book?
Prince Ruperts Cube
This construction shows that it is possible to make a hole in a cube, through which a larger cube can pass! The points on the sides that define the cut-out are placed 3/4 of the way from one coner to the next.