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- n any polyhedron having four plane faces
- So Wardley decided to make his own model, the Airbow, inspired by the tetrahedron-shaped kite invented by Alexander Graham Bell.
- Designed by architect Rem Koolhaas, the tetrahedron-shaped building will physically transform throughout the summer, rotating in cadence with different monthly cultural programs .
- This she described as a "polyhexagonal lacelike pattern of atoms with the characteristic lacunae or holes, the whole forming a truncated tetrahedron, a cage-like space enclosing .