This pyramid has a square base and four equilateral triangles on the sides. For further information about Berman's models of regular-faced convex polyhedra, see 1978.1065.01.

We consider a Diophantine equation arising from a generalization of the classical Lucas problem of the square pyramid: when is the sum of the first m-gonal numbers n-gonal? We use the theory of ...

The Great Pyramid The Documentary Iconic Geometry Episode 3 of 3 Cecil Balmond examines the shapes that define three of the world's iconic structures, Stonehenge, the Taj Mahal and the Great Pyramid.

This model resembles a cube with a square pyramid on one face. The faces are five square faces and four equilateral triangles. On Berman's models of regular-faced convex polyhedra, see 1978.1065.01.