square
It a polyhedron
They are prisms. The bases may be any polygons with three or more sides.
Oh, dude, it's like this - the number of faces on a prism is always two more than the number of sides on its base. So, if you've got a prism with a pentagonal base, you can expect it to have 7 faces. It's just one of those math things that's like, "Hey, I'm here to mess with your head a little."
My answer to that question is eight sides. * * * * * Actually, there is no single answer because a prism is a generic term which is used to describe a polyhedron with two congruent and parallel bases and a number of rectangular faces joining them. If the base is a polygon with n sides (n ≥ 3), then the corresponding prism has n+2 faces. So a prism can have 5 or more faces.
There is no greatest. Any polygon you draw, no matter how many sides it has, I can always draw a polygon with more sides than yours has. They don't all have names, but there's no limit to the number of sides they can have.
A polyhedron with 13 or more faces.
A polygon that has more faces than a hexahedron (which has 6 faces) but fewer than a dodecagon (which has 12 sides) is an octagon, which has 8 sides. Additionally, a nonagon, with 9 sides, also fits this criterion. Both shapes meet the requirement of having more than 6 faces and fewer than 12.
That's impossible. A shape has three or more sides/faces. There is NO shape that has one or two sides/faces
A rectangular pyramid has five faces. Sides are the same things as faces. A pyramid with a triangular base has 4 faces. This is the more common type of pyramid in mathematics, as it is a platonic solid.
polyhedron
I presume the question is meant to be: How many sides does a pyramid have? The answer is 4 or more. A pyramid has a polygonal base where the polygon can have 3 or more sides. Corresponding to each of these sides there will be a triangle rising to the apex of the pyramid. In all, a pyramid whose base is a polygon with n sides will have n+1 faces (sides).
A pentagonal prism has only 7 faces. Each of the five lateral faces is perpendicular to the two bases: that makes 10 pairs of mutually perpendicular faces. In general, the lateral faces are not perpendicular, but four of them may be perpendicular to one or more of its neighbors - at most 4 more pairs. Still not 25!