This topic focuses on determining the number of orders of rotational symmetry for various 2D shapes. It is an advanced part of a geometry basics unit and involves analyzing pictures to identify how many times a shape can be rotated around a central point to look the same. There are multiple-choice questions, each showing a different 2D shape image, with options ranging from zero to higher numbers, reflecting different potential symmetries each shape could possess. This helps in understanding the concept of rotational symmetry within two-dimensional figures.