One surface, if one surface is flush with the curvature of the earth's surface.
A square pyramid will not have any curved faces.
None.
A square pyramid does not have any curved edges; it has a total of eight edges. This includes four edges at the base, which form a square, and four triangular edges that connect the apex of the pyramid to each vertex of the base.
A square pyramid has no curved edges; it consists of eight edges in total, which are all straight. There are four edges forming the base (the square) and four edges connecting the apex to each vertex of the base. Thus, the square pyramid is characterized by its straight edges and flat faces.
5
There are no curved edges on a triangular pyramid.
A pyramid has a combination of flat and curved surfaces, but it typically consists of flat surfaces only. Specifically, a pyramid has a base that is a polygon (flat surface) and triangular faces that connect the base to a single apex, all of which are flat. Therefore, a standard pyramid has no curved surfaces. The total number of surfaces depends on the number of sides of the base polygon; for example, a square pyramid has five flat surfaces (one base and four triangular faces).
none
There are none
There are no curved edges, but it does stack.
None. All faces on a pyramid are flat.
There are infinitely many possible answers. A square based pyramid is one.