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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
pyramid or bera