When stacking apples on a market stall, fruit sellers “naturally” adopt a particular arrangement: a regular pyramid with a triangular base. Scientists have now demonstrated that this ...

Object Details maker Wheeler, Albert Harry Description This plastic model has a white equilateral triangle for the base and three clear plastic isoseles triangles for sides. Models 1979.0102.205, ...

A pyramid is made up of a polygonal base face and triangular faces that meet at a point called the apex. A pyramid is named by the shape of its ‘base’.

Example Another name for a tetrahedron is a triangular pyramid. Other pyramids are named after the shape of the polygon at the base. What are the names for these pyramids?