Heptahedron.
They are the faces of the polyhedron.
No polyhedron has five sides as a pentagon and a hexagon has six sides
A polyhedron has "many sides" (by definiton). The only 3-D shape which does not have "many sides" is a sphere (which technically only have one "side").
A non polyhedron does not have these properties, maybe it is not closed, maybe one or more of the sides is a curved surface. In some branches of topology the sides of a polyhedron cannot intersect each other.http://wiki.answers.com/What_is_the_difference_between_a_polyhedron_and_a_non_polyhedron#ixzz185DDOyd9
If, by "sides" you mean faces, then the answer is a pentahedron.
Heptahedron.
A polyhedron is a solid shape with many sides. The word "polyhedron" does not specify a number of sides.
A Pyramid; Four sides and the base.
polyhedron
It a polyhedron
They are the faces of the polyhedron.
It is a polyhedron with two congruent sides: nothing more, nothing less.
It is not a regular polyhedron because it has unequal sides
No. A polyhedron is 3 dimensional. You have a regular polygon, regular because the sides are equal. If you asked about 20 surfaces, then it would be a polyhedron.
No it's not. There are only 5 regular polyhedra, and none of them has 10 sides.
No polyhedron has five sides as a pentagon and a hexagon has six sides