When two figures have the same shape and size, they are **congruent**. **Similar** means that the figures have the same shape, but not the same size.

## Congruence

Figures that have the same shape AND size are congruent.

## Similarity

Similar figures have the same shape but not necessarily and the same size.

The **symbol** ∼ is used to indicate similarity.

Two **triangles** are said to be **similar** if their corresponding angles are congruent and the corresponding sides are in proportion . In other words, **similar triangles** are the same shape, but not necessarily the same size.