One common situation that can be represented with proportional relationships is analyzing similar figures. Similar figures are different sizes of the exact same shape.

When setting up a proportion for a pair of similar figures, you can only compare the lengths of corresponding sides. Corresponding sides are the matching sides of the similar figures. In the picture above, the corresponding sides are labeled with upper and lower case of the same letter.

Select the matching pairs by clicking on the tile that represents one of the corresponding sides or one of the equivalent ratios:

- Corresponding sides
- Equivalent ratios