Similar Figures + Vocabulary (Basic)

Two figures are similar if they have the same shape but not necessarily the same size. Their corresponding angles are equal, and their corresponding sides are in proportion.

'Corresponding' refers to matching parts of similar figures, such as angles or sides that are in the same relative position.

'Congruent' means that two figures or shapes are identical in shape and size; all corresponding sides and angles are equal.

You can determine the missing side by setting up a proportion based on the lengths of the corresponding sides of the similar figures.

Corresponding angles of similar figures are congruent.

A proportion is an equation that states that two ratios are equal.

To set up a proportion, you can use the ratio of the lengths of corresponding sides of the similar figures and set them equal to each other.

The lengths of corresponding sides of similar figures are in the same ratio.

The scale factor is the ratio of the lengths of corresponding sides of two similar figures, indicating how much one figure has been enlarged or reduced compared to the other.

The areas of two similar triangles are in the ratio of the square of their corresponding side lengths.