The base being the bottom of a shape.
A pyramid with a square base has 4 sides.
A pyramid with a triangular base has 3 sides.
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No. The sides are always triangular, the base can be a polygon with any number of sides.
A pyramid is a generic term, used to describe a three dimensional shape with a polygonal base and triangular sides that meet at an apex above the base. The base can be a polygon with any number of sides and the number of faces, edges and vertices of a pyramid depend on this number of sides. If the base is an n-sided polygon, then the pyramid has 2n edges.
It is three times the number of sides on a base of the prism.
It all depends on what the base is. Th number of faces a pyrimad has is the number sides on the base+1. So for example, a square pyrimad (one of the most common) would have 4 +1 or 5 sides.
n+1 = vertices of a pyramid If: n = number of sides of the polygonal base AND a pyramid has 1 point where line segments from points of the polygonal base intersect