1. Transformations
Moving a shape or object according to prescribed rules to a new position.
USE the tracing paper provided to help you understand in the exam.

2. Reflection
Rotation
Translation
Combined Transformations
Enlargement (A later presentation)

3. Reflection
The shape (A) is reflected in a mirror line so that the new position (shape B) is the same distance from the mirror line but the shape is reversed (mirror image).
Distances from any point to the line are identical.
Mirror line A B

4. Axis reflections
X axis reflection
Y axis reflection
y = –1
Reflection in line x = 2
Reflection in line y = –1
x = 2

5. Reflection on the line y = x
Think about where the line would be!
Measure from the original to the mirror line and then extend to the other side.

6. Rotation
The shape is rotated about a given centre by a given angle and stating whether clockwise or anticlockwise. A A B
A  B = 90O clockwise about the origin (0,0)

7. Rotation
The shape is rotated about a given centre by a given angle and stating whether clockwise or anticlockwise. A A C
A  C = 180O clockwise about the origin (0,0)

8. Translation
This means move the shape in both the ‘x’ and ‘y’ direction. Given as a vector y
The “vector” given is written in a large bracket as shown below A x
The translation from A to B is given by B
i.e. 1 across and 6 down

9. Combined Transformations
Two or more transformations may combine to give ‘something different’.
In this case
two reflections
of ‘A’ can be shown to be a rotation to produce ‘C’ A C B

10. Combined Transformations
2 Reflections =
2 Rotations =
Reflection + Rotation (90)
3 c/w Reflections =
This is particularly useful to remember for the exam!!
1 Rotation (180)
1 Rotation (add the angles)
= Rotation (180)
1 Reflection (anti-c/w)