go to the
regular polygon calculator.
The diagram at the top of the page depicts a right regular pyramid
 a solid geometric figure whose base is a
regular polygon
, whose faces are all
congruent isosceles triangles, and whose
vertex is perpendicular to
the center of base.
Like the above diagram, the Great Pyramid of Egypt has a square base and 4 triangular faces and
that's what most people think of when they hear the word 'pyramid'.
However, mathematically speaking, the base could have any number of sides,
3 or greater.
