Which of the following are polyhedrons? a-cone b-polygon c-prism d-pyramid

C. Prism

D. Pyramid                    

Step-by-step explanation:

We know that:

Polyhedron is a solid in three dimensions with flat polygonal faces, straight edges and sharp corners or vertices. The word polyhedron comes from the Classical Greek word meaning many base.The faces of a polyhedron are polygons, which means they have straight sides.Cone is a three dimensional figure but cone is not a polyhedron since cone has curved surface and not flat faces.Polygon is not a polyhedron because it is not three dimensional.Prism and pyramids are polyhedron since they are three dimensional and have flat polygon faces.

The answer is lol i dont know

25% increaseplus i think decrease i only know increase: ((