Two. 4 faces are triangles and the base is a square.
If the base of the pyramid is square, it must have four triangular vertical faces in order to meet at the apex (top). Such a 3D shape is a "square pyramid".
A square pyramid.
A triangular pyramid has a triangular base and three triangular faces meeting at its apex. A square pyramid has a square base and four triangular faces meeting at its apex.
A pyramid shape, by default, has a square base. It therefore has 5 faces.
a a square based pentagon
It is a square pyramid.
A square-based pyramid
A square based pyramid.
Mathematically, a pyramid is a 3-dimensional shape formed by a polygonal base with n sides, and n triangular faces meeting at an apex - which is a point not in the plane of the base. It therefore has n+1 faces, where n is the number of sides of the polgonal base. Common pyramids have a triangular base (4 faces) or square base (5 faces).
There would be one face for each side of the square. The answer is four if you or only counting the triangular faces. It would be five if you are including the square base. * * * * * One square base and four triangular faces (that meet at an apex above the base).
Nine; eight triangular faces which all meet at the apex and the base, which is in the shape of an octagon.