a polyhedron
A two dimensional figure does not have volume or depth such as flat surfaced polygons.
A polyhedron.
Any convex three dimensional figure with straight edges (or plain faces) will have polygons for bases so there is an infinity of such shapes.
polygons
polygon
Planes figures such as polygons are not solids. Solids are three-dimensional .
They are called polygons
It is a polygonal prism.
It is a polygonal prism.
A polyhedron. Examples include pyramids and cubes.
Prism
No. Like all polygons, a heptagon is a 2-dimensional closed figure.