A pyramid will have as many triangular faces as the number of sides its base has, plus one in the shape of its base. This means an octagon based pyramid has nine faces (eight triangular ones plus the octagon base).
12
a triangular based pyramid has 4 faces.
An octagonal based pyramid has 9 faces
A square based pyramid has 8 edges and 5 faces.
5 faces
8
An octagonal pyramid has 9 faces and 14 edges. The base of the pyramid is an octagon with 8 faces, and the pyramid itself has an additional triangular face. The edges consist of the edges of the octagon base and the edges connecting the base to the apex of the pyramid.
a triangle- based pyramid has 4 faces
12
a triangular based pyramid has 4 faces.
An octagonal based pyramid has 9 faces
A square based pyramid has 8 edges and 5 faces.
Nine; eight triangular faces which all meet at the apex and the base, which is in the shape of an octagon.
5 for a square based pyramid
A square-based pyramid has five faces -- the square base and four triangular faces.
5 faces
6 faces