1. Unit 36 Constructions and Enlargements
Presentation 1
Lines of Symmetry
Presentation 2
Order of Rotational Symmetry
Presentation 3
Enlargements
Presentation 4
Finding the Scale Factor and Centre of Enlargement

2. Unit 36
Lines of Symmetry

3. Draw on each diagram all its lines of symmetry

4. Complete the diagrams so that each shape has only the lines of symmetry shown by the dotted line

5. 36.3 Order of Rotational Symmetry
Unit 36
36.3 Order of Rotational Symmetry

6. What is the order of rotational symmetry?2 ? ? 2 3
1 or none ? ?

7. Complete the diagrams below so that they have the given rotational symmetry about the point.
Order 4
Order 2
Order 3
Order 4

8. Unit 36
36.3 Enlargements

9. What is the ratio of the areas in each case? (a) 4 (b) 9
Enlarge this shape using the given centre of enlargement and scale factors:
(a) (b) 3
What is the ratio of the areas in each case?
(a) (b) 9 ? ?

10. 36.4 Finding the Scale Factor and Centre of Enlargement
Unit 36
Finding the Scale Factor and Centre of Enlargement

11. For each of the shapes give the scale factor and mark the centre of enlargement.2
1.5
2.5 ? ? ? ?