# Using Similar Figures

## Finding Missing Lengths

With similar figures, you can use proportions to find missing side lengths.

You can use indirect measurement to measure distances that are difficult to measure directly. You can do this using proportions and similar triangles.

#### Real-World Problem Solving

Indirect MeasurementA 6-ft person standing near a flagpole has a shadow 4.5 ft long. The flagpole has a shadow 15 ft long. What is the height of the flagpole?

d** Draw a diagram** like the one at the right. Let

*x*represent the height of the flagpole.

The height of the flagpole is 20 ft.

Exercises Click here to view the Exercises for this lesson.

Technology Click here to view Technology: Creating Similar Figures.

Reading Math Click here to view Reading Math: Learning Vocabulary.