**Use the enlargement transformation to explain similarity and develop the conditions for triangles to be similar (ACMMG220)**

**LO: To use the enlargement transformation to explain the conditions of triangles to be similar.**

**Know:**

- That enlargement is the increase in size of an object.
- Triangles are a 3-sided, 3-angled shape.

**Understand:**

- That the enlargement transformation keeps certain aspects of the shapes the same, but also changes some other aspects..

**Do:**

- I can use the enlargement transformation to explain the conditions of triangles..

**Enlargement Transformation**

### An **enlargement** is a transformation which changes the size of an object **without **changing its shape.

### In Geometry, two shapes are **Similar** when the only difference is size (and possibly the need to move, turn or flip one around).

These butterflies demonstrate enlargement.

These triangles also demonstrate enlargement.

The objects in the same colour are similar figures.