A prism has a constant cross-section throughout its length. When the cross-section is a triangle, the prism is called a triangular prism. When the cross-section is a hexagon, the prism is called a ...
Archaeologists have begun digging for what they think might be a pyramid hidden beneath a hill in Bosnia. Known as Visocica, the 650m (2,120ft) triangular mound, overlooking Visoko, has long been ...