Rectangular Prism. It's lateral faces are 4 rectangles. It's bases are 2 squares.
They are squares.
If the faces are flat, it's a line.
A vertex is the name of a corner on a solid where three or more faces meet (plural = vertices).
The solid with 12 equal faces is a dodecahedron. A dodecahedron has 12 equal pentagon surfaces.
a triangular prism.