There are infinitely many possible shapes. One such is a cube with one vertex sliced off.
There is no such shape.
Spherical
Cone
A cone perhaps?
Square pyramid.
There is no 3-d shape with 4 and 1 = 5 triangular faces.
There is no such shape.
The solid shape that has one square face and four triangular faces is called a pyramid. If you were to have a shape that had four triangular faces and no square face, it would be called a triangular pyramid.
Its an Cylinder
None
Spherical
Sphere
A cone?
A cone.
Cone
hemisphere
A cone perhaps?