  In this study, various rotationally symmetric tilings that can be formed
using pentagons that are related to rhombus are discussed. The pentagons can be
convex or concave and can be degenerated into a trapezoid. If the pentagons are
convex, they belong to the Type 2 family. Because the properties of pentagons
correspond to those of rhombuses, the study also explains the correspondence
between pentagons and various rhombic tilings.
