• The PentaBlock pattern block shapes work together to create patterns easily because all of their angles are multiples of 36°.
• KaleidoMania and Tess are both software packages for exploring cyclic, dihedral, frieze and wallpaper patterns.
• Poly is a software package that allows the viewing of 2-D nets folding into 3-D polyhedra.
• Googolplex and Polydron are two types of manipulatives for building 2-D nets and 3-D polyhedra models.
• There are many Internet sites that provide excellent geometry resources.