A Pentagon is a polygon having five sides and five interior angles.

A CYLINDER is a surface or solid bounded by two parallel planes and generated by a straight line moving parallel to the given planes and tracing a curve bounded by the planes and lying in a plane perpendicular or oblique to the given planes.

Pyramid

A PYRAMID is a solid having a polygonal base, and triangular sides that meet in a point. Here is an example of how pyramid is used in the world.