No. By definition a polyhedron has to have faces (flat surfaces), edges, and vertices. A sphere, hemisphere, and a cylinder are all solids but are not polyhedra.
Polyhedron is a geometric solid in three dimensions with flat faces and straight edges.
simlar polyhedron
geometric solid
A polyhedron is a solid shape with many sides. The word "polyhedron" does not specify a number of sides.
A polyhedron is a solid shape with four or more polygonal faces. A hexahedron is a solid shape with six polygonal faces and so is a particular type of polyhedron.
A cube is a solid figure called a polyhedron. A polyhedron is a solid figure with all flat faces. So a cone would be a solid figure but not a polyhedron becasue it has a curve and does not have all flat faces.
NO!!! A triangle is a 2-dimensional shape of three sides; archaically a 'trigon'. A polyhedron is a 3-dimensional solid of many sides.
Each polyhedron is a kind of solid object. Some solid objects -- for example, a sphere or a torus -- are not polyhedra, but every solid object can be closely approximated with a polyhedra.
No, not every polyhedron is a regular solid. A regular solid, also known as a Platonic solid, is a polyhedron with all faces being congruent regular polygons and the same number of faces meeting at each vertex. In contrast, polyhedra can have irregular shapes, varying face types, and different vertex configurations, making them distinct from regular solids. Examples of non-regular polyhedra include cubes, pyramids, and prisms that do not meet the criteria of regular solids.
A polyhedron.
A face.
A polyhedron is any 3D solid (such as a cube) - therefore, it can have any number of faces.