#### Objectives

- Students will identify corresponding parts of similar figures.
- Students will apply what they know about similar figures to solve real-world design problems.

#### Vocabulary

- similar
- corresponding parts

#### About the Lesson

In this lesson, students use similar figures to solve real-world applications. In Problem 1, students use similar rectangles to enlarge a photo. In Problem 2, students use similar triangles to estimate the height of a building.

As a result, students will:

- Use the definition of similarity to decide if two figures are similar.
- Model with geometry and apply the principle of similar figures to solve design problems.
- Explain the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.