From above, the building appears as a big, well-defined triangle with nearly straight sides that form an almost perfect equilateral shape ...

Polyhedrons come in all shapes and sizes. Anything that has multiple faces joined at their edges can be a polyhedron. Picture Earth as a six-sided cube. Or as a triangular pyramid with four faces ...

A recently unearthed geometric formation within the highly classified grounds of Area 51 has reopened global intrigue surrounding the enigmatic U.S. military base. Photographed by Google Earth ...