4. Fill in the blanks:
| Shape | Centre of Rotation | Order of Rotation | Angle of Rotation |
| Square | |||
| Rectangle | |||
| Rhombus | |||
| Equilateral Triangle | |||
| Regular Hexagon | |||
| Circle | |||
| Semi-circle |
The given table is completed as shown:
| Shape | Centre of Rotation | Order of Rotation | Angle of Rotation |
| Square | intersection point of diagonals. | 4 | |
| Rectangle | Intersection point of diagonals. | 2 | |
| Rhombus | Intersection point of diagonals. | 2 |
|
| Equilateral Triangle | Intersection point of medians. | 3 | |
| Regular Hexagon | Intersection point of diagonals. | 6 | |
| Circle | centre of circle | infinite | any angle |
| Semi-circle | centre of circle | 1 | |