A 2-dimensional figure with 12 sides is called a dodecagon. A 3-dimensional figure with 12 sides (faces) is called a dedecahedron.
A square based pyramid
If it is a 2-dimensional figure then it is a quadrilateral. If it is a 3-dimensional figure then it is a tetrahedron.
A polyhedron is a 2 dimensional object. To have fasce it would have to be at least 3 dimensional. If you want to know what is a polyhedron with 4 sides, it's a quadrilateral THAT'S NOT QUITE RIGHT - actually it's completely false. Sorry, Ratty, a polyhedron is a 3 dimensional figure. Polygon refers to 2 dimensional figures. A pyramid with a triangular base is a polyhedron with 4 faces.
A hexahedron is a polyhedron with six faces. a 3-dimensional figure with 6 sides (like a cube or a die)
No. A square is a 2-dimensional figure. A cube is a 3-dimensional figure whose faces are all squares.
An edge.
A 3 dimensional figure
a sphere
A triangular prism (Two triangles as the two bases)
A polyhedron.
A 2-dimensional figure with 12 sides is called a dodecagon. A 3-dimensional figure with 12 sides (faces) is called a dedecahedron.
A cube has onely square faces.
A square based pyramid
If I understand the question correctly, the answer is faces.
A triangular-based pyramid
Cylinder