In following this round-trip path, the ant has to pass through another vertex (point B) before returning to its starting point. That’s the catch: Every straight path that starts and ends on the same ...

Because of this, we know that for the tetrahedron, cube, octahedron, and icosahedron, there are no straight paths going from a vertex back to itself that don’t pass through another vertex.

The Cuboid bone is one of the 7 tarsal bones on the foot. It is a square bone, located on the outside of the foot, connecting the 4th and 5th metatarsals the heel bone.