Question 13 Marks
Fill in the blanks:
| Figures | Centre of rotation | Order of rotation | Angle of rotation |
| Square | ________ | ________ | ________ |
| Rectangle | ________ | ________ | ________ |
| Rhombus | ________ | ________ | ________ |
| Equilateral triangle | ________ | ________ | ________ |
| Regular hexagon | ________ | ________ | ________ |
| Circle | ________ | ________ | ________ |
| Semi-circle | ________ | ________ | ________ |
Answer
View full question & answer→| Figures | Centre of rotation | Order of rotation | Angle of rotation |
| Square | Point of intersection of the line segments joining the mid-points of opposite sides. | $4$ | $90$ |
| Rectangle | Point of intersection of the line segments joining the mid-points of opposite sides. | $2$ | $180$ |
| Rhombus | Point of intersection of diagonals. | $2$ | $180$ |
| Equilateral triangle | Point of intersection of angle bisectors i.e, centroid. | $3$ | $120$ |
| Regular hexagon | Centre of the hexagon. | $6$ | $60$ |
| Circle | Centre of the circle. | Unlimited | Any angle |
| Semi-circle | Nil | Nil | Nil |
