None.
There are none
None normally
it has 0 curved faces
A tetrahedron is a triangular based pyramid that has 4 faces, 6 edges and 4 vertices.
There are no curved edges on a triangular pyramid.
5
There are none
None normally
It depends on what type of pyramid. Their is an square pyramid, a rectangular pyramid, a pentagonal pyramid, etc.
0 it only has pointy edges
it has 0 curved faces
The question is ambiguous since a rectangular pyramid and a rectangular prism will have different numbers of flat surfaces. There is no indication in the question which shape is intended.
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).
A "rectangular" is an adjective, not a noun and so there is no way of knowing what the shape is. It could be a rectangular 2-d shape, a rectangular pyramid, a rectangular prism and they would all have different answers.
A rectangular prism is a cuboid. It has no curved faces.
A tetrahedron is a triangular based pyramid that has 4 faces, 6 edges and 4 vertices.
There are five faces on a rectangular pyramid.