Four sides on the outside, depending on its chambers, many more.
In geometry, pyramid has many forms such as rectangular pyramid, trapezoidal pyramid, quadrilateral pyramid and even triangular pyramid. Triangular pyramid is a pyramid with triangular base and can be called as a tetrahedron if each of its faces has congruent equilateral triangles.
A square pyramid is a pyramid whose base is in the shape of a square.
Square Pyramid
A tetrahedron (triangular pyramid) A rectangular pyramid, A pentagonal pyramid, A hexagonal pyramid, A heptagonal pyramid, An octagonal pyramid, A nonagonal pyramid, the list is endless. Plus you can have prisms for each of the above. Then there are the sphere, ellipsoid, cone. Not forgetting irregular and concave shapes.
star pyramid
There is a glass pyramid outside of The Louvre in Paris.
sand.....
Outside Cairo.
your cheeks
TeeHee!
Yes the outside, but not the inside.
a pyramid
No. It was placed outside the great Pyramid of Giza.
There are a number of entrances / passageways / shafts.
Architect I. M. Pei
Ieoh Ming Pei