A pyramid.
Only one; a triangle is a 2D shape, not a 3D shape. Usually only 3D (or more) shapes are considered to have 'faces'.
There is no such thing as a 3d triangle. A 3d shape which has only equilateral triangular faces can be a tetrahedron which has 4 faces or an icosahedron which has 20.
Yes, and three rectangular faces.
A 3D shape with one base and three faces can only have triangular faces.
A tetrahedron (triangular pyramid).
triangle
no stupid because one has got faces(3d) and the other has sides(2d)
Such a shape does not exits. See the attached link for all 3d shapes with 6 plane faces.
1
The 3d shape that have five faces would be a triangular prism **************** or a pyramid
A 3d shape with 5 faces can be a square pyramid