A pyramid with 5 sides is a PYRAMID.
First side is the SQUARE base, which you probably don't think about.
Sides 2,3,4 & 5 are the four triangular faces.
The pyramids of ancient Egypt are of this form.
There is NO such thing as a pyramide of four sides. That is a Tetrahedron.
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4 sides. * * * * * No, it has 5 faces.
5
If the base is a polygon with n sides, the pyramid will have n+1 faces. Triangle base (3 sides) gives 5 faces, Quadrilateral base (4 sides) has 5 faces, etc.
a cone has a round surface and a circle bottom, but a pyramid has 5 squares. * * * * * A pyramid does not have 5 squares! It has a polygonal base with any number of sides. Attached to each of these sides, it has a triangle, and they meet at an apex.
A right square based pyramid.