# What are congruent and similar shapes?

Two identical 2D shapes are said to be

**congruent**.Two 2D shapes that share the same proportions are

**similar**.The angles and side lengths can help us decide which type they are.

## How do we determine the type of shape?

### Congruent

If one shape can be **rotated**, **reflected** or **translated** to fit exactly onto another shape, then the shapes are said to be congruent. Congruent shapes have the **same** area, size, angles and lengths as each other.

### Similar

If we enlarge one shape to make it bigger or smaller, then the shapes are said to be similar. The corresponding sides of similar shapes must be in the **same proportion** and the **corresponding angles are identical**. Similar shapes are **not** the same size as each other.

Some examples of similar shapes are: different size circles, an A4 and an A5 piece of paper.