# Resizing examples

**Example 1**

Enlarge the following shape by a scale of 3 from the graph origin.

**Example 2**

Resize the following shape by a `1/3` from the centre co-ordinates (1,1).

**Example 3**

Resize the following rectangle by a factor of `-2` with the centre at the origin (of the graph).

**Example 4**

Enlarge the following triangle by a scale of 3 from the graph origin (0).

**Example 5**

Describe fully the transformation which maps triangle A onto Triangle B.

The first stage is to find the origin which you can achieve by joining the respective corners with a line and extending them.

The extended lines all cross at point O which must therefore be the CENTRE point.

We must now work out the scale.

Take any point and on one side alone work out the change in scale.

`3` becomes `9`

`3timesx=9`

`x=9/3`

`x=3`

## Check

`3times3=9`

So the answer is: The single transformation which maps triangle A onto triangle B is an enlargement with centre of coordinate (1,2) and scale of `+3`.