True or false: a cylinder is a polyhedron

A cylinder is not a polyhedron because:

1. Polyhedron:
   A polyhedron is a three-dimensional shape with:
   • Flat polygonal faces.
   • Straight edges where the faces meet.
   • Vertices (points where edges meet). e.g., cube, pyramid).
2. Cylinder’s Features:
   • A cylinder has curved surfaces, not flat polygonal faces.
   • It has no edges or vertices.
   • Its bases (circles) are not polygons, as polygons are made of straight lines.

Thus, a cylinder does not meet the criteria to be classified as a polyhedron.